... nbr, epdm,silicone... More than 1500 o ring sizes O ring is one of the main products in our ... CR),Styrene(SBR) ,CR,ACM,PU etc.Application: O ring is widely used in different industries: Auto, Machinery, ... diameter (C.D) Minimum0.44mm. O ring outer diameter Maximal 530mm2. Color: black, white, yellow, brown, green, blue, transparent, ... goods to customer in the exact performance. Clear silicone ring