... 2.Material: NBR, NR,EPDM, Silicone, etc 3.Different sizes are availabe Product NameEPDM Rubber gasket for couplingsCertificateISO9001:2008Country of OriginChinaAdvantagea. Ozone ... with many different sizes of Rubber gasket for PVC pipe according to your drawing or samplesMatetialNBR, NR ,EPDM ,SBR ,SR ,CR ,IIR ... portQingdao Please don't hesitate to contact with us for more information. Thank you .