... ,90 black,white,red,green,yellow,blue NSF,FDA,WRAS,TZW,W270,UL AS568,P.G.etc. ItemRubber O ring DescriptionDescriptionWidely ... , ISO 361/1and Customized specificationCertificationISO9001-2008, TS16949, NSF, WRAS, UL, TZW, ACS, FDA,DVGW,ROHSMaterialAll raw material meet European REACH, ROHS ... ' requirement High Quality Rubber o ring approved NSF,FDA,WRAS,TZW,W270,UL,ACS,DVGW,ROHS