Rubber O-ring is widely used on industrial and machines. Ø Item: Rubber O-ringØ Material: EPDM, NBR, NR, Viton, Silicon.Ø ... Size: We can produce according to clients designØ Color:Black, red ... , brown, green, grey, white.Ø Packing: As to your request.Ø Advantage: Our products have the features of oil ...