We offer O ring. O-rings can be molded in a wide range of compounds in hardnesses from 40 to 95 Shore A. These materials include: • Acrylonitrile-Butadiene (NBR) • Butyl (IIR) • Chloroprene (CR) • Ethylene Acrylic (AEM) • Ethylene Propylene (EPDM) • Fluorocarbon (FKM) • Fluorosilicone (FVMQ) • Hydrogenated Nitrile (HNBR) • Perfluoroelastomer (FFKM) • Polyacrylate (ACM) • Silicone (VMQ)