18650 spot welding point, batteries flat tip Size: 9.5 MM (diameter) * 2.0 MM (height) (middle convex circle diameter) * 6.0 MM * 0.3 MM thickness), on the edge of Model: 18650 lithium batteries Features: no rust, easy to spot welding Usage: used for 18650 lithium batteries Material: stainless steel Processing custom: yes