... chemical use 4.customized ItemSilicone Rubber Molded Sealing WasherSizeTo be customizedDescribeOffer Silicone sealing rings OEM and customized desgin .can be ... such as multicolored embossed, debossed, Silk-printing, etc.Silicone sealing rings is durable and tensile ,heat-resisting and cold- ... resisting(-60 degree to 180 degree) Silicone sealing rings is Non-toxic, not craze, long service life ...