{"product_id":"m-c1280-p-or-bi-iso-v70","title":"ISO 3601 C1280 FKM Fluorocarbon Metric O-Ring, 70A Durometer, 128mm ID x 3.55mm CS (5.039\" x 0.140\", 135.1mm OD) - Precision-Molded Replacement Sealing Ring for Pumps, Valves \u0026 Fittings","description":"\u003cp\u003eChasing a leak or a slow drip and need the exact metric o-ring size to seal it for good? A worn or wrong-size o-ring lets fluid weep past the joint, drops pressure, and can damage the equipment around it.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eThis Beaver Island Parts Company replacement o-ring is a single ISO 3601 C1280 o-ring, a standard metric sealing size measuring 128mm inside diameter by 3.55mm cross-section (5.039\" ID x 0.140\" CS, 135.1mm outer diameter), molded in 70A Fluorocarbon (FKM) rubber.\u003c\/p\u003e\u003cbr\u003e\u003cb\u003eFull Compatibility:\u003c\/b\u003e ISO 3601 C1280 is an international-standard o-ring size used across pumps, valves, filters, fittings and machinery worldwide. If your application calls for a 128mm x 3.55mm o-ring, this is the size.\u003cbr\u003e\u003cb\u003eInstallation Note:\u003c\/b\u003e Clean the groove, inspect the sealing surface, seat the new o-ring without twisting it, and lubricate before assembly.\u003cbr\u003e\u003cb\u003ePro Tip:\u003c\/b\u003e Apply \u003ca href=\"https:\/\/beaverislandparts.com\/products\/aqua-flex-food-grade-silicone-lubricant-50g\" target=\"_blank\" rel=\"noopener\"\u003eAqua Flex\u003c\/a\u003e lubricant before installation to ease seating and extend seal life.\u003cbr\u003e\u003cp\u003eWe are an American family-owned and operated small business committed to high-quality replacement parts and honest fitment information.\u003c\/p\u003e","brand":"Beaver Island Parts Company","offers":[{"title":"1 (Single)","offer_id":48609689469133,"sku":"M.C1280.1.OR.BI.ISO.V70","price":11.99,"currency_code":"USD","in_stock":true},{"title":"5-Pack","offer_id":48609689501901,"sku":"M.C1280.5.OR.BI.ISO.V70","price":28.99,"currency_code":"USD","in_stock":true},{"title":"10-Pack","offer_id":48609689534669,"sku":"M.C1280.10.OR.BI.ISO.V70","price":45.99,"currency_code":"USD","in_stock":true},{"title":"25-Pack","offer_id":48609689567437,"sku":"M.C1280.25.OR.BI.ISO.V70","price":103.99,"currency_code":"USD","in_stock":true},{"title":"50-Pack","offer_id":48609689600205,"sku":"M.C1280.50.OR.BI.ISO.V70","price":175.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0611\/8110\/0237\/files\/AS568-250_fd1954ce-1e54-45b7-9d03-8555f3460e23.png?v=1785879901","url":"https:\/\/beaverislandparts.com\/products\/m-c1280-p-or-bi-iso-v70","provider":"Beaver Island Parts Company","version":"1.0","type":"link"}