... :NSF,FDA,WRAS,KTW,W270,UL,ACS,ROHS Itemred rubber valve DescriptionMaterial: SiliconeHardness:Shore40,50,60,70,80,90Color: black,white ... resistance, acid/alkali resistance, abrasion resistance etc.SizeAS568, P.G Series, ISO 361/1and Customized specificationThousands designs and exsiting molds are ...