rubber colorful o ring silicone ShoreA50,60,70,80,90 black,white,red,green,yellow,blue NSF,FDA,WRAS,TZW,W270,UL ... AS568,P.G.et Itemrubber colorful o ring siliconeDescriptionMaterial: siliconeShoreA50 ... ,60,70,80,90black,white,red,green,yellow,blueNSF,FDA,WRAS,TZW,W270 ...