... 1)Materials:NBR, CR, Vition, Silicone, etc 2)Color:black, white, red, green, brown, etc 3)ozone resistant rubber gaskets / rubber washer ... Specifications:1) Materials: NBR, CR, Vition, Silicone, etc2) Color: black, white, red, green, brown, etc3) Excellent chemical and physical property, excellent oil ...