... -ring for medical parts:1)Strictly according to the ASTM20052)Excellent Chemical and physical property3)Long use life and excellent compression rate ... low temperature, oil, water, tensile, elongation, and has a good compression set, etc. MaterialNBR, EPDM, SILICONE(MVQ), Viton(FPM), HNBR, ACM ... TermT/T Customer’ s designwelcome Silicone rubber O-ring for medical parts