water tube black o ring ShoreA50,60,70,80,90 black,white,red,green,yellow, ... ,FDA,WRAS,TZW,W270,UL Lead time15days Itemwater tube black o ringDescriptionMaterial:NBR,EPDM,FKM,ACM,IIR,SiliconShoreA50,60,70,80 ... ,W270,ULAS568,P.G.etc.AdvantageGood Ozone resistance, aging resistance, high/low temperature resistance, acid/alkali resistance, weather resistance, abrasion resistance ...