![](/assets/components/phpthumbof/cache/Back-Ups_l.c56b65be20f3614ba2f7cd97b0444fba.jpg)
These materials include FKM, Hytrel, Urethane, Nylon, Polymyte, Parbak, and Leather. Back-Ups pair with O-Rings to increase resistance to extrusion and tolerance to some fluids.
- SKU: ORSBSpecial
- Material: FKM, Urethane
- Downloads: Available Materials for Back-Ups.pdf, O-Ring Size Chart