water tube black o ring ShoreA50,60,70,80,90 black,white, ... ,blue NSF,FDA,WRAS,TZW,W270,UL Lead time15days Itemwater tube black o ringDescriptionMaterial:NBR,EPDM,FKM,ACM,IIR,SiliconShoreA50,60 ... , acid/alkali resistance, weather resistance, abrasion resistance, voltage resistance and insulating resistance etc.SizeAS568, P.G Series, ISO 361/1and Customized ...