... ,NBR... 3.ISO9001: 2008 4.OEM/ODM are welcomed 1.Gear oil seal2.Material: NBR,HNBR,PTEE,FPM,MVQ,EPDM,PTFE ... on.8.According to customers' drawing,customized specifications are welcomed.9.All administration of manufaturing are undercontroled by Railway Ministry10.Designing ... all of oil seals, gaskedts,o-rings ,and so on. Gear oil seal