water tube black o ring ShoreA50,60,70,80,90 black,white,red,green,yellow,blue NSF,FDA,WRAS,TZW,W270, ... UL Lead time15days Itemwater tube black ... , voltage resistance and insulating resistance etc.SizeAS568, P.G Series, ISO 361/1and Customized specificationCertificationISO9001-2008, TS16949, NSF, WRAS, UL, TZW ...