1.Extemal retaining rings 2.Material: Spring steel 3.Size: All size 4.Surface processing: Black ,Zinc plating ,Nickel plating 1.Basic extemal retaining rings2.Material: Spring steel3.Size: All size4.Surface processing: Black ,Zinc plating ,Nickel plating5.Package: Carton packing or wooden packing6.History: Founded in 19837.Main products : Kinds of washers , spring pins ,bearing clamp and so onOur ...