{"product_id":"bs211-ptfe-bur","title":"BS211 3.53mm Section 20.22mm Bore PTFE 55 Polymer Back-Up Ring","description":"\u003cstrong\u003eBack-up Rings:\u003c\/strong\u003e Back-up rings, or anti-extrusion rings, are thin rings that are designed to prevent O-ring extrusion under pressure. They fit in the gland between the seal and the clearance gaps to provide zero clearance.","brand":"Simply PTFE Back-Up Rings","offers":[{"title":"Default Title","offer_id":54116901159253,"sku":"BS211.PTFE.BUR","price":1.27,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0979\/1491\/3109\/files\/ptfeorings_0920891a-be29-4498-bb6f-3aa7528e444b.jpg?v=1782111701","url":"https:\/\/simplybearings.com\/products\/bs211-ptfe-bur","provider":"Simply Bearings Ltd - Ball Bearings, Oil Seals, O-rings, V-Belts, SKF","version":"1.0","type":"link"}