water tube black o ring ShoreA50,60,70,80, ... ,W270,UL Lead time15days Itemwater tube black o ringDescriptionMaterial:NBR,EPDM,FKM,ACM,IIR,SiliconShoreA50 ... green,yellow,blueNSF,FDA,WRAS,TZW,W270,ULAS568,P.G.etc.AdvantageGood Ozone resistance, aging resistance ... resistance, voltage resistance and insulating resistance etc.SizeAS568, P.G Series, ISO 361/1and Customized specificationCertificationISO9001-2008 ...