Material: NBR,HNBR,,EPDM,SI,FKM,SBR,ACM,FLS,AFLS Product: o ring Certification: ISO9002:2009,TS16948,NSF,ACS Best Ring Technology Co.,Ltd (short for LSB) has some years' experiences in engine accessories,rubber seal and has a comprehensive set of technical solutions. Dedicated to the development and research in engine parts and rubber seals ,we are professionl OEM that provide customers with full ...