Snap buttons Made of Stainless steel, which is hard, sturdy and not easy to get erosion and rust, with smooth surface, convenient for you to use in the daily life Each snap button contains 2 parts, The front part and the back part, very easy to install, and these 2 parts can buckle together which can work as fasteners for any sewing project Specifications: Diameter: 16mm Color: black and silvery Quantity: 20/black 20/silvery Note: Small items, please keep away from children.