... rubber sealing Material: silicone Hardness:Shore40,50,60,70,80,90 Approved:NSF,FDA,WRAS,KTW,W270,UL,ACS,ROHS Itemwater valve rubber ... designs and exsiting molds are available for you.CertificationISO9001-2008, NSF,FDA,WRAS ... PAHS,NP requirement.NBR,EPDM,FKM,Silicon rubber etc. are available.Packing Spec.Standard packing ... follow customers' requirement valve rubber sealing approved W270,KTW,WRAS,NSF