{"product_id":"sewtech-size-l-sa155-prewound-bobbins-70d-2-60wt-black-polyester-bobbin-thread-144-piece-pack","title":"Sewtech Size‑L (SA155) Prewound Bobbins | 70D\/2 60WT Black Polyester Bobbin Thread, 144‑Piece Pack","description":"\u003cstyle\u003e\n  .sewtech-bobbin {\n    --green: #087b45;\n    --green-dark: #075833;\n    --ink: #17201c;\n    --muted: #5e6862;\n    --cream: #f7f3eb;\n    --line: #dfe7e2;\n    max-width: 1200px;\n    margin: 0 auto;\n    color: var(--ink);\n    font-family: Arial, Helvetica, sans-serif;\n    line-height: 1.55;\n  }\n  .sewtech-bobbin * { box-sizing: border-box; }\n  .sewtech-bobbin img {\n    display: block;\n    width: 100%;\n    height: auto;\n    border-radius: 20px;\n  }\n  .sb-hero {\n    display: grid;\n    grid-template-columns: 1.08fr .92fr;\n    align-items: center;\n    gap: clamp(28px, 5vw, 72px);\n    padding: clamp(28px, 5vw, 72px);\n    background: linear-gradient(135deg, #f7faf8, #edf6f0);\n    border-radius: 28px;\n    overflow: hidden;\n  }\n  .sb-eyebrow {\n    margin: 0 0 12px;\n    color: var(--green);\n    font-size: 13px;\n    font-weight: 800;\n    letter-spacing: .14em;\n    text-transform: uppercase;\n  }\n  .sb-hero h1 {\n    margin: 0;\n    font-size: clamp(34px, 5vw, 64px);\n    line-height: 1.04;\n    letter-spacing: -.035em;\n  }\n  .sb-lead {\n    margin: 22px 0 0;\n    color: var(--muted);\n    font-size: clamp(17px, 2vw, 21px);\n  }\n  .sb-chips {\n    display: flex;\n    flex-wrap: wrap;\n    gap: 10px;\n    margin-top: 25px;\n  }\n  .sb-chip {\n    padding: 9px 13px;\n    border: 1px solid #bdd6c8;\n    border-radius: 999px;\n    background: #fff;\n    color: var(--green-dark);\n    font-size: 14px;\n    font-weight: 700;\n  }\n  .sb-section { padding: clamp(55px, 8vw, 100px) 0; }\n  .sb-section + .sb-section { border-top: 1px solid var(--line); }\n  .sb-heading {\n    max-width: 760px;\n    margin: 0 auto 42px;\n    text-align: center;\n  }\n  .sb-heading h2 {\n    margin: 0 0 13px;\n    font-size: clamp(30px, 4vw, 48px);\n    line-height: 1.1;\n    letter-spacing: -.025em;\n  }\n  .sb-heading p { margin: 0; color: var(--muted); font-size: 18px; }\n  .sb-grid-4 {\n    display: grid;\n    grid-template-columns: repeat(4, 1fr);\n    gap: 18px;\n  }\n  .sb-card {\n    padding: 26px;\n    border: 1px solid var(--line);\n    border-radius: 20px;\n    background: #fff;\n  }\n  .sb-icon {\n    display: grid;\n    width: 44px;\n    height: 44px;\n    margin-bottom: 18px;\n    place-items: center;\n    border-radius: 50%;\n    background: #e8f4ed;\n    color: var(--green);\n    font-size: 21px;\n    font-weight: 900;\n  }\n  .sb-card h3 { margin: 0 0 8px; font-size: 19px; }\n  .sb-card p { margin: 0; color: var(--muted); font-size: 15px; }\n  .sb-split {\n    display: grid;\n    grid-template-columns: 1fr 1fr;\n    align-items: center;\n    gap: clamp(28px, 5vw, 72px);\n  }\n  .sb-copy h2 {\n    margin: 0 0 18px;\n    font-size: clamp(30px, 4vw, 48px);\n    line-height: 1.1;\n    letter-spacing: -.025em;\n  }\n  .sb-copy p { color: var(--muted); font-size: 17px; }\n  .sb-list { margin: 24px 0 0; padding: 0; list-style: none; }\n  .sb-list li {\n    position: relative;\n    margin: 13px 0;\n    padding-left: 30px;\n    font-weight: 700;\n  }\n  .sb-list li::before {\n    position: absolute;\n    left: 0;\n    color: var(--green);\n    content: \"✓\";\n  }\n  .sb-specs {\n    display: grid;\n    grid-template-columns: repeat(4, 1fr);\n    gap: 1px;\n    overflow: hidden;\n    border: 1px solid var(--line);\n    border-radius: 20px;\n    background: var(--line);\n  }\n  .sb-spec {\n    padding: 24px 18px;\n    background: #fff;\n    text-align: center;\n  }\n  .sb-spec strong { display: block; color: var(--green-dark); font-size: 24px; }\n  .sb-spec span { color: var(--muted); font-size: 13px; }\n  .sb-banner {\n    padding: clamp(32px, 5vw, 64px);\n    border-radius: 24px;\n    background: var(--green-dark);\n    color: #fff;\n    text-align: center;\n  }\n  .sb-banner h2 { margin: 0 0 12px; font-size: clamp(28px, 4vw, 44px); }\n  .sb-banner p { max-width: 760px; margin: 0 auto; color: #d8eee2; font-size: 17px; }\n  .sb-gallery {\n    display: grid;\n    grid-template-columns: 1fr 1fr;\n    gap: 20px;\n  }\n  .sb-gallery figure { margin: 0; }\n  .sb-gallery figcaption {\n    padding-top: 10px;\n    color: var(--muted);\n    font-size: 14px;\n    text-align: center;\n  }\n  .sb-note {\n    margin-top: 24px;\n    padding: 18px 20px;\n    border-left: 4px solid var(--green);\n    border-radius: 8px;\n    background: var(--cream);\n    color: #4f5b54;\n    font-size: 14px;\n  }\n  @media (max-width: 900px) {\n    .sb-hero, .sb-split { grid-template-columns: 1fr; }\n    .sb-hero-copy { order: 1; }\n    .sb-hero-media { order: 2; }\n    .sb-grid-4, .sb-specs { grid-template-columns: 1fr 1fr; }\n  }\n  @media (max-width: 560px) {\n    .sewtech-bobbin img { border-radius: 14px; }\n    .sb-hero { padding: 24px 18px; border-radius: 18px; }\n    .sb-grid-4, .sb-specs, .sb-gallery { grid-template-columns: 1fr; }\n    .sb-section { padding: 48px 0; }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"sewtech-bobbin\"\u003e\n\u003csection class=\"sb-hero\"\u003e\n\u003cdiv class=\"sb-hero-copy\"\u003e\n\u003cp class=\"sb-eyebrow\"\u003eSewtech · Embroidery Essentials\u003c\/p\u003e\n\u003ch1\u003eProfessional Results Start with a Better Bobbin\u003c\/h1\u003e\n\u003cp class=\"sb-lead\"\u003ePrewound Size‑L (SA155) Bobbins with Soft‑Spun 70D\/2 Polyester Thread | Engineered for Smooth Feeding, Even Tension \u0026amp; Reliable High‑Speed Embroidery\u003c\/p\u003e\n\u003cdiv class=\"sb-chips\"\u003e\n\u003cspan class=\"sb-chip\"\u003eSize L \/ SA155\u003c\/span\u003e \u003cspan class=\"sb-chip\"\u003e70D\/2 · 60 wt.\u003c\/span\u003e \u003cspan class=\"sb-chip\"\u003eBlack Polyester\u003c\/span\u003e \u003cspan class=\"sb-chip\"\u003e144 Pieces\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sb-hero-media\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0659\/2243\/3184\/files\/black_prewound_bobbins.jpg?v=1788771893\" alt=\"\"\u003e\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection class=\"sb-section\"\u003e\n\u003cdiv class=\"sb-heading\"\u003e\n\u003ch2\u003eMade for consistent stitching.\u003cbr\u003eLess setup, more embroidery.\u003c\/h2\u003e\n\u003cp\u003eSkip manual winding and keep production moving with clean, tightly packed bobbins ready for your next design.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sb-grid-4\"\u003e\n\u003carticle class=\"sb-card\"\u003e\n\u003cdiv class=\"sb-icon\"\u003e1\u003c\/div\u003e\n\u003ch3\u003eUniform tension\u003c\/h3\u003e\n\u003cp\u003eAdvanced machine winding maintains consistent thread tension from the first layer to the last.\u003c\/p\u003e\n\u003c\/article\u003e\n\u003carticle class=\"sb-card\"\u003e\n\u003cdiv class=\"sb-icon\"\u003e2\u003c\/div\u003e\n\u003ch3\u003eBreak resistant\u003c\/h3\u003e\n\u003cp\u003eSoft‑spun polyester thread delivers reliable stitching for demanding, high‑speed embroidery applications.\u003c\/p\u003e\n\u003c\/article\u003e\n\u003carticle class=\"sb-card\"\u003e\n\u003cdiv class=\"sb-icon\"\u003e3\u003c\/div\u003e\n\u003ch3\u003eClear plastic sides\u003c\/h3\u003e\n\u003cp\u003eTransparent flanges resist distortion, repel machine oil absorption, and simplify quick inventory identification.\u003c\/p\u003e\n\u003c\/article\u003e\n\u003carticle class=\"sb-card\"\u003e\n\u003cdiv class=\"sb-icon\"\u003e4\u003c\/div\u003e\n\u003ch3\u003eReady to use\u003c\/h3\u003e\n\u003cp\u003eEliminate pre‑winding time, letting operators swap bobbins quickly and stay focused on production.\u003c\/p\u003e\n\u003c\/article\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection class=\"sb-section sb-split\"\u003e\n\u003ch2\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0659\/2243\/3184\/files\/L_bobbins.png?v=1788774137\" alt=\"\"\u003e\u003cstrong\u003eNeat layers for smooth, predictable feeding\u003c\/strong\u003e\n\u003c\/h2\u003e\n\u003cdiv class=\"sb-copy\"\u003e\n\u003cp\u003eEvery bobbin is wound tightly and evenly to minimize tension shifts between layers. This delivers smoother operation, fewer workflow interruptions, and more consistent, repeatable embroidery across entire production batches.\u003c\/p\u003e\n\u003cul class=\"sb-list\"\u003e\n\u003cli\u003eConsistent thread delivery\u003c\/li\u003e\n\u003cli\u003eReduced winding and changeover time\u003c\/li\u003e\n\u003cli\u003eReliable batch-to-batch performance\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection class=\"sb-section\"\u003e\n\u003cdiv class=\"sb-heading\"\u003e\n\u003cp class=\"sb-eyebrow\"\u003eProduct specifications\u003c\/p\u003e\n\u003ch2\u003eSize‑L bobbins built for commercial embroidery workflows\u003c\/h2\u003e\n\u003cp\u003eAlso known as Style L or SA155.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sb-specs\"\u003e\n\u003cdiv class=\"sb-spec\"\u003e\n\u003cstrong\u003e20.3–20.7 mm\u003c\/strong\u003e\u003cspan\u003eApprox. outside diameter\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sb-spec\"\u003e\n\u003cstrong\u003e8.9 mm\u003c\/strong\u003e\u003cspan\u003eApprox. bobbin height\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sb-spec\"\u003e\n\u003cstrong\u003e70D\/2\u003c\/strong\u003e\u003cspan\u003eSoft-spun polyester\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sb-spec\"\u003e\n\u003cstrong\u003e60 wt.\u003c\/strong\u003e\u003cspan\u003eFine bobbin thread\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-top: 28px;\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0659\/2243\/3184\/files\/black_Bobbin_Size.jpg?v=1788771974\" alt=\"\"\u003e\u003cstrong\u003eFit note:\u003c\/strong\u003e Bobbin names and dimensions can vary by machine. Check your embroidery or sewing machine manual before purchasing.\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection class=\"sb-section sb-split\"\u003e\n\u003cdiv class=\"sb-copy\"\u003e\n\u003cp class=\"sb-eyebrow\"\u003eWide compatibility\u003c\/p\u003e\n\u003ch2\u003eBuilt for many multi-needle machines\u003c\/h2\u003e\n\u003cp\u003eSize‑L \/ SA155 bobbins are widely compatible with commercial embroidery machines, including models from Sewtech, Ricoma, Happy, Tajima, BAI, ZSK, and Melco. They also fit select home embroidery and sewing machines.\u003c\/p\u003e\n\u003cul class=\"sb-list\"\u003e\n\u003cli\u003eIdeal for many commercial multi-needle machines\u003c\/li\u003e\n\u003cli\u003eSupports smooth high-speed stitching\u003c\/li\u003e\n\u003cli\u003eConvenient for production shops and studios\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003ch2\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0659\/2243\/3184\/files\/application_of_L_bobbins.png?v=1788774203\" alt=\"\"\u003e\u003cstrong\u003eChoose the correct size\u003c\/strong\u003e\n\u003c\/h2\u003e\n\u003c\/section\u003e\n\u003csection class=\"sb-section\"\u003e\n\u003cdiv class=\"sb-heading\"\u003e\n\u003ch2\u003eSize L is shorter than Size A\u003c\/h2\u003e\n\u003cp\u003eThey have a similar diameter, but their heights and intended machine types differ.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sb-gallery\"\u003e\n\u003cfigure\u003e\n\u003cfigcaption\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0659\/2243\/3184\/files\/application_of_black_bobbins.jpg?v=1788774272\" alt=\"\"\u003eSize L compared with Size A \/ Class 15\u003c\/figcaption\u003e\n\u003c\/figure\u003e\n\u003cfigure\u003e\n\u003cfigcaption\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0659\/2243\/3184\/files\/bobbin-size-guide-premium-style.png?v=1784894428\" alt=\"\"\u003eReference guide for common bobbin formats\u003c\/figcaption\u003e\n\u003c\/figure\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection class=\"sb-section sb-split\"\u003e\n\u003cdiv\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0659\/2243\/3184\/files\/black_polyester_bobbins.jpg?v=1788774311\" alt=\"\"\u003e\u003cbr\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sb-copy\"\u003e\n\u003cp class=\"sb-eyebrow\"\u003eEssential white\u003c\/p\u003e\n\u003ch2\u003eA versatile foundation for everyday projects\u003c\/h2\u003e\n\u003cp\u003eThis neutral‑white bobbin thread performs beautifully for embroidery, sewing and DIY projects. Its soft, cotton‑like texture makes it ideal for garments and designs worn next to the skin.\u003c\/p\u003e\n\u003cul class=\"sb-list\"\u003e\n\u003cli\u003eClean white color for versatile use\u003c\/li\u003e\n\u003cli\u003eSoft feel suitable for apparel\u003c\/li\u003e\n\u003cli\u003eOrganized bulk packaging for easy storage\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection class=\"sb-section\"\u003e\n\u003cdiv class=\"sb-heading\"\u003e\n\u003cp class=\"sb-eyebrow\"\u003eCreate with confidence\u003c\/p\u003e\n\u003ch2\u003eFrom production runs to detailed designs\u003c\/h2\u003e\n\u003cp\u003eDependable bobbin tension gives your embroidery a strong, clean foundation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sb-gallery\"\u003e\n\u003cfigure\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0659\/2243\/3184\/files\/vibrant-embroidery-pattern-collage.png?v=1784895283\" alt=\"\"\u003e\u003c\/figure\u003e\n\u003cfigure\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0659\/2243\/3184\/files\/new-embroidery-pattern-collage_bbc5d6f5-c46b-4889-9205-d361e235afd3.png?v=1784895281\" alt=\"\"\u003e\u003c\/figure\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection class=\"sb-banner\"\u003e\n\u003ch2\u003eReady when inspiration strikes\u003c\/h2\u003e\n\u003cp\u003eKeep a reliable stock of Sewtech Size‑L prewound bobbins on hand, so you can spend more time stitching — not winding.\u003c\/p\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e","brand":"Sewtalent","offers":[{"title":"black","offer_id":56209617355057,"sku":null,"price":22.88,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0943\/3579\/5505\/files\/black_polyester_bobbins.webp?v=1789037315","url":"https:\/\/magnahoops.com\/products\/sewtech-size-l-sa155-prewound-bobbins-70d-2-60wt-black-polyester-bobbin-thread-144-piece-pack","provider":"MagnaHoops","version":"1.0","type":"link"}