... ISO9001: 2008 4 OEM/ODM are welcomed EPDM O Ring/NBR O Ring1 EPDM O ring 2 Material: NBR,HNBR,PTEE,FPM ... ,MVQ,EPDM,PTFE,and so on3 Application: trains,automobile,motocycles,trucks,buses, ... all of oil seals, gaskedts,o-rings ,and so on. EPDM O ring