Material: silicone/epdm/fvmoq/nbr and so on Raw material brand: momentive, dupont, shinetsu, wacker, lanxess Material standard: astm d2000, sae j200, jis and so on Size : according to your requirements. Products function: accurate flow control. Controling the fluid flow to one direction, at the same time , prevent fluid to flow in the opposite direction. Mold style: compression, injection, extrusion, lsr injection Application: be suitable for auto industry, medical equipment, household appliances, and liquid Distributor, vacuum pressure pump, liquid soap dispatcher, and so on Lead time: according to clients' requirements Package: pe bag+outer carton or according to clients' requirements