Silicone O-ring 1,Any size are welcome 2,Top quality and best price 3.100% environmental food grade silicone material. silicone O-ring Material NBR, HNBR, FPM (VITON), FFKM, MVQ (SILICONE), EPDM, Neoprene (CR), ACM Color Any color Size Any size Feature Available upon request: FDA grade, resistant to high or low temperature, compatible with plastics, etc. Silicone O-ring