... silicone, NR, NBR, CR, EPDM etc.3. Resistant to high and low temperature.4. Our rubber products can approved by FDA ... , LFGB. According to clients demand.5. All rubber parts are safe, non-toxic, odorless and environmental protection.6. We are a professional ... 11 years experience.7. Any questions, welcome to contact us. Silicon O Ring for electrical equipment