FKM compoundMaterial Type: Black Fluoroelastomer Rubber, Hardness Shore A 56-65.Copolymer of vinylidene fluoride and hexafluoropropylene.To meet ASTM D2000 line call-out M2HK610, A1-10, B37, B38, EF31, EO78, F15, Z1. Z1 = compression set 30% max.Application: For oil seals and hoses requiring...