{"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":1.79,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0979\/1491\/3109\/files\/ptfeorings_847383fc-b024-4259-90d2-2bc5e941638a.jpg?v=1785960172","url":"https:\/\/www.simplybearings.ca\/products\/bs211-ptfe-bur","provider":"Simply Bearings Ltd - Ball Bearings, Oil Seals, O-rings, V-Belts, SKF","version":"1.0","type":"link"}