... , good air-permeable, etc.4.Application:automobile,electrical appliance,mechanical, industrial, construction,household,medical,trains,automobile,motocycles,trucks,buses, ... .Size tolerance: exactly upon your request or standard tolerance.8.Strong point: we have our own mold center, can ... welcomed as well.11.Designing and manufacturing all of oil seals, gaskedts,o-rings ,and so on.12.Outside diameter ...