... , heat-resistant, 3.Certification: FDA, SGS Round design silicone rubber jointed rings1.Material: silicone rubber, soft and stretchy, 40shore A2.OD118xID90x1.9mm Thickness3.Raw material ... , EPDM, CR, Silicon, FKM, Neoprene, etc.4. All food grade silicone production process confirmed by ISO9001, and ROHS approve5.Color: white ...