... are welcomed O ring 1.O ring 2.Material: NBR,HNBR,PTEE,FPM,MVQ,EPDM,PTFE,and so on3.Application: trains,automobile,motocycles ... : we have our own mold center, can develop most kinds O ring of high tech requireds.7.Experience in export business ... relationship.Export products are include rubber widescreen,elbow,oil seal,o-ring andso on.8.According to customers' drawing,customized specifications ...