I have the pleasure to know your address and it is glad to have an opportunity  introduce you one of the products we are exporting, Steel Ball.We are quite familiar with steel balls business. We can supply steel balls of various sizes ranging from diameterD5.5mm(7/32inch) to D76.2mm(3inch)in line with the manufacture standards as follows:* China Standard GB308-89,* ISO3290-1975 (E),* ANSI/AFBMA STANDARD.10-1989,* DIN5401-1993The material can be carbon steel ,stainless steel ball and copper balls, etc. The products are widely used for the lines of bearings, agriculture machinery, engineering machinery, bicycle, electric power tool, valve, e-game machine, and etc.