... skeleton oil seal ; closed basin, oriented belt, cell to ring, dust ring, metal hose, customizd non-standard rubber parts and molds, ... production and operation of all kinds of new and old international O-ring.Good quality and best prices1.Material: NBR,HNBR,PTEE ... Export products are include rubber widescreen,elbow,oil seal,o-ring andso on.7.According to customers' drawing,customized specifications ...