Features:1. Metal snap buttons, is made from copper & nickel-plated brass materials, with a metallic finish.2. Lightweight & practical, simple shapes, & beautiful. Suitable for DIY handmade.3. You will receive 20 of each piece Caps / Studs / Sockets / Posts. Specification: Type Stainless Steel Snap Material Copper+nickel-plated brass Cap Diameter 15mm /0.59inch Stud Diameter 13mm /0.51inch Socket Diameter 14mm/0.55inch Post Diameter 13mm/0.51inch Color Silver Package Included:80 X Stainless Steel Snap