1. various rubber O ring with good quality and competetive prices . 2. Types: ring, round, square, triangle,or make as your order. 3. Size: All sizes are available . 4. Material: Rubber, NBR, Silicone, Viton, FKM, PTFE, HNBR, etc. 5. colour: various and custom made . 6. Certification:ISO 2009:2008. 7. Fuction: Automobile,electronic,mechinery . 8. Advantages :we have years of professional experience ,the quality is best and the prices are competetive. 9. small quantity and OEM is welcomed.