This product is made of SUM23 imported steel with CNC precision turning.

The surface treatment is electroplated black stroke.
Swimming is the electrophoretic coating at the Yin and Yang poles, under the action of voltage, the charged coating ions move to the cathode, and interact with the alkaline substance produced on the cathode surface to form insoluble substance, deposited on the surface of the workpiece.

Tiansheng has been specializing in non-standard customized fasteners for 12 years. Welcome to visit, guide and customize your products.