... : 2000 4.OEM/ODM are welcomed 1 Valve oil seal 2 Material: NBR,HNBR,PTEE, ... FPM,MVQ,EPDM,PTFE,and so on3 Application: trains,automobile,motocycles,trucks ... ,buses,agricutural machinery and any equipments4 Certification: GB/T19001-2000-ISO9001 ... Railway Ministry10 Designing and manufacturing all of oil seals, gaskedts,o-rings ,and so on. Valve oil seal