... process to make new mould quickly Founded in 1995, Xiamen Maifeng Seal Products Co., Ltd. specializes in O-rings, U-rings, Y-rings, rubber ... different sizes of gasket to you according your requirements;2) Material: NR, NBR, IR, EPDM, CR, BR, SBR, Silicone, Viton,etc ... by box. Safety Approval:We have full-scale certification of material and products, like the UL, FDA, NSF NSF-61, ISO 9001 ...