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
Back-Up Rings & Anti Extrusion Rings | Supplier of Quality Sealing Products | Eastern Seals UK
Back-up Ring | Static Seals | Trelleborg
Back-up ring - Anti-extrusion ring - FRANCE JOINT
Backup Rings (BUR) | Plastics Injection Molding | CTG Inc.