Cleaning Machine Ring 1) 100% silicone 2) REACH, FDA, SGS, LFGB 3) ... silicone, NR, NBR, CR, EPDM etc.3. Resistant to high and low temperature.4. Our rubber products can approved by FDA ... demand.5. All rubber parts are safe, non-toxic, odorless and environmental protection.6. We are a professional rubber products manufacturer ...