Customized clear heat resistance food grade waterproof silicone rubber grommetTemperature RangeMaterialNR, NBR, HNBR, EPDM, Silicone, ACM, AEM, FKM, FVMQ, etc.  rubber waterproof grommetColorBlack (recommended), but other color availableHardness20~90 Shore A  rubber waterproof grommetSizeDN max = 2000mm, all other smaller sizes will per customer demands   rubber waterproof grommetProperties        (Optional and Multiple)Oil Resistance, Chemical Resistance, Steam Resistance, Aging Resistance, Heat Resistance, Cold Resistance, Fire Resistance, Environment Protective, Strong Resilience, Abrasion Resistance, etc.The  Rubber Waterproof Grommet can endure the temperature from -20 to 350 degree centigrade.AVAILABLE SIZESIt can be the regular size And can be not normal size Can all kinds of shapes, round, square, oval  Rubber Waterproof GrommetThe size of  Rubber Waterproof Grommet also Can be CustomizedCustom Sizes: If you need customized size, please feel free to contact XINGKETAI sales representative Richard in the end.Application: Seal for Automotive, Machine, Valve, Electrical Appliances, etc..   Working ProcessWe can provide all kinds of Food grade silicone rubber gaskets , all kinds of colors,or transparent. And any shapes, round, square, oval silicone washers are okay for providing.welcome to customize.Production workshop