... ,Polyurethane,FVMQ,FFKM,Aflas, etc.Durosilicone for 20~80 Shore A, others about 40~90 Shore AColorThe ... how to choose the material, not the expensive is the best, each material has its advantage, according to your requirement and the work environment of the ... rubber parts, choosing the best material.Our company was established in 1990 to manufacture ...