1. Excellent quality and competitive price 2. Precision level Z1V1, ... 2RS; With one or two side metal shields Z and ZZ.Standard: 8*16*5mm, OEM orders are ... heat treatment, machiningPlace of The Products: Original Place and Package.Payment: TT,L/CApplication: They are now ... industries,metal wheels, sports equipment, machinery and equipment, toys, model aircraft and so on.Welcome to visit our factory ...