... service 20days to deliver 20"FCL Rubber products1. All rubber products are made according to international standard: ISO 3601, AS 568A ... , DIN3771, JIS B2401.2. Our products are of NSF, WRAS, DVGW, FDA and ROHS approved.3 ... , BUTYL, SBR, Neoprene, HYPALON, etc.6.Resistant temperature,Resistant Friction, Resistant Aging.7.More picture of our products as following high quality ...