Amanteao Bronze Double Cap Rivets Plane Cap 6mm and Post 4mm Pack of 200 Sets Size:Cap Size: 6mm, Post Size :4mm ,Base Size: 6mm Measure Conversion:1mm=0.0393 inch 1 inch=25.4 mm,1 pcs cap and 1 pcs base for 1 set Rivet Style: Double Cap When only the best will do, these rivets offer the finished. There are a lot of size and color double cap rivets in my store