O ring 1.material:NBR,EPDM,VMQ 2.used in auto brake ... :ISO/TS16949 ISO14001 4.high quality and competitive pric o-ring seals1. material: SILICONENBR, NR,FPM,MVQ,EPDM, RUBBER,SBR..2 ... Customized according to your Requirement2.Designs and Specification are Accepted Silicon O ring