... main function is sealed, such as a gas seal, water seal, oil seal etc. O-rings enquiries parameters: material, size, ... shock absorption, etc.CertificateISO9001:2008,NSF, ROHS, REACH.FDA, WRASPortShanghsi/Qingdao/TianjinDelivery Time10-15 days after confirmation of ... technology, stable quality. e). Good Material stability, excellent seal results.f). High and low temperature resistance, oil resistance ...