... ringDescriptionMaterial: SiliconeHardness:Shore40,50,60,70,80,90Color: black,white,red,green,yellow,blue,brown,orangeAdvantageAging resistance, high/low ... packing: follow customers' requirement food grade colorful o ring with high quality approved NSF61,WRAS,UL,FDA,ACS,UL ... and regulations , also it will be clearly display in the full report >> Production Capacity: Product line name Production Line ...