{"product_id":"brother-upper-knife","title":"Brother Upper Knife","description":"\u003cdiv style=\"box-sizing: border-box; width: 100%; max-width: 1100px; margin: 0 auto; padding: 18px; font-family: Arial,Helvetica,sans-serif; color: #1f2933; line-height: 1.6;\"\u003e\n\u003cdiv style=\"box-sizing: border-box; display: flex; flex-wrap: wrap; gap: 24px; align-items: flex-start; width: 100%;\"\u003e\n\u003cdiv style=\"box-sizing: border-box; flex: 1 1 320px; min-width: 260px; text-align: center;\"\u003e\n\u003cbr\u003e\n\u003cdiv style=\"box-sizing: border-box; display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; width: 100%;\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"box-sizing: border-box; flex: 1 1 360px; min-width: 260px;\"\u003e\n\u003cp style=\"margin: 0 0 8px 0; font-size: 13px; letter-spacing: 1px; text-transform: uppercase; color: #64748b;\"\u003eBrother\u003c\/p\u003e\n\u003ch2 style=\"margin: 0 0 12px 0; font-size: clamp(24px,4vw,36px); line-height: 1.15; color: #334155;\"\u003eBrother Upper Knife XB1687001\u003c\/h2\u003e\n\u003cp style=\"margin: 0 0 18px 0; font-size: 16px;\"\u003eKeep your serger cutting cleanly with the \u003cstrong\u003eBrother Upper Knife XB1687001\u003c\/strong\u003e. This replacement upper knife is designed for select Brother serger models and helps restore smooth trimming performance when the original blade becomes dull, nicked, or worn from regular use.\u003c\/p\u003e\n\u003cdiv style=\"box-sizing: border-box; display: flex; flex-wrap: wrap; gap: 10px; margin: 0 0 20px 0;\"\u003e\n\u003cdiv style=\"box-sizing: border-box; flex: 1 1 140px; background: #f8fafc; border: 1px solid #e2e8f0; border-radius: 10px; padding: 12px; text-align: center;\"\u003e\n\u003cdiv style=\"font-size: 13px; color: #64748b;\"\u003ePart Type\u003c\/div\u003e\n\u003cdiv style=\"font-size: 18px; font-weight: bold; color: #0f172a;\"\u003eUpper Knife\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"box-sizing: border-box; flex: 1 1 140px; background: #eff6ff; border: 1px solid #bfdbfe; border-radius: 10px; padding: 12px; text-align: center;\"\u003e\n\u003cdiv style=\"font-size: 13px; color: #64748b;\"\u003eBrand\u003c\/div\u003e\n\u003cdiv style=\"font-size: 18px; font-weight: bold; color: #0f172a;\"\u003eBrother\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"box-sizing: border-box; flex: 1 1 140px; background: #f8fafc; border: 1px solid #e2e8f0; border-radius: 10px; padding: 12px; text-align: center;\"\u003e\n\u003cdiv style=\"font-size: 13px; color: #64748b;\"\u003ePart Number\u003c\/div\u003e\n\u003cdiv style=\"font-size: 18px; font-weight: bold; color: #0f172a;\"\u003eXB1687001\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3 style=\"margin: 0 0 10px 0; font-size: 20px; color: #334155;\"\u003eProduct Details\u003c\/h3\u003e\n\u003cul style=\"box-sizing: border-box; margin: 0 0 18px 0; padding-left: 20px; font-size: 16px;\"\u003e\n\u003cli style=\"margin-bottom: 6px;\"\u003eReplacement upper knife for select Brother sergers\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 6px;\"\u003eBrother part number: XB1687001\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 6px;\"\u003eHelps restore clean fabric trimming while serging\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 6px;\"\u003eIdeal replacement for a dull, damaged, chipped, or worn upper blade\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 6px;\"\u003eFits Brother serger models 1034DX, 3034D, 4234D, 4234DT, and 5234PRW\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 6px;\"\u003eGreat maintenance part for keeping serger edges neat and professional\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 6px;\"\u003eRecommended for sewists who use their serger frequently for garment sewing, knits, home decor, and finishing seams\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv style=\"box-sizing: border-box; background: #f8fafc; border-left: 5px solid #334155; border-radius: 10px; padding: 14px 16px; margin: 0;\"\u003e\n\u003cp style=\"margin: 0; font-size: 15px; color: #1e293b;\"\u003eA practical Brother serger replacement blade that helps maintain clean cutting, smooth trimming, and professional-looking finished seams.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"BROTHER","offers":[{"title":"Default Title","offer_id":54214384091411,"sku":"XB1687001","price":31.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0926\/9559\/3235\/files\/tmpXB1687001.webp?v=1779917838","url":"https:\/\/authorizedvacandsew.com\/products\/brother-upper-knife","provider":"Authorized Vac and Sew","version":"1.0","type":"link"}