Replacement O-ring & Backup Ring for Chambers - Bauer
Back-up Rings (Anti-extrusion Rings)
Case Study: Benefits of a Contoured Back-Up Ring | Marco Rubber and Plastics
Global O-Ring and Seal on Twitter: "Requesting for backup? We have backup rings readily available in NBR, Viton, and Teflon (Solid, Split, and Spiral versions). Use our Backup Ring Size Chart here
O-rings and back-up rings | SKF
O-Ring BR Backup Ring (Polytetrafluoroethylene Resin) JIS-B-2407 | MUSASHI OILSEAL | MISUMI South East Asia