... standard and non-standard O-Rings 2) Various colors available PTFE O ring:Product all kinds of O ring,Y ring ... and best prices1.Material: NBR,HNBR,PTEE,FPM,MVQ,EPDM,PTFE,and so on2.Application: trains,automobile,motocycles,trucks,buses,agricutural ... specifications are welcomed.8.Designing and manufacturing all of oil seals, gaskedts,o-rings ,and so on.