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