use high quality materail produce, PTFE, FKM prodcue the oil seal can promise long life use Features: 1) Working temp. range: -93oC to 250oC2) Resistant to strong acids and alkalis3) Long durability and friction endurance4) Japanese and Taiwanese technology employed5) Excellent sealing ability6) Simple installation7) Material composition: rubber, NBR, FPM, ACM, VMQ (MQ)8) OEM orders welcome 9) ...