AS568 Standard Dimensions rubber o ring 1.made of 100% rubber material ... receiving custom MaterialNBR,SBR,EPDM,SILICONE,VITON,NR and etcSizeCustomized/standard and nonstandardLogoDebossed,embossed and silk printingStandardROHS,REACH,FDA and LFGBFeature ... confirmed and deposit received, just depends on order quantity. AS568 Standard Dimensions rubber o ring