... called: rivets), and there are all kinds of styles, welcome to buy.Cap rivetMaterial: copper, iron, zinc alloy, stainless steel, ( ... painting, screen printing and other processes. Color: any color according to customers’ needs. Size: 3mm ---- 15mm, etc. (many specifications, ... screen printing, laser, etc 3mm----15mm etcany color according to customers’ needsButton is in mid-high quality. The price ...