... 9001 3. OEM service 4. excellent oil 5. delivery time: within 7 days rubber oil seal manufacturer1. Material: NBR, HNBR, ... business relationship. Export products are include rubber widescreen, elbow, oil seal, o-ring andso on.7. According to customers' ... are undercontroled by Railway Ministry9. Designing and manufacturing all of oil seals, gaskedts, o-rings10 MOQ: 500 pcs11. Promise quality12 ...