【Size】: 【A】1.55mm, 【A】2.1mm, 【A】2.55mm, 【A】3.1mm, 【A】4.1mm, 【A】5.1mm, 【B】3.1mm, 【B】 4.1mm, 【B】5.1mm, 【B】6.1mm, 【B】8.1mm. 【Note】: Because 2.05 and 2.55mm holes are very small, processing difficulty, so it will be very difficult to receive inserted, you need to use a drill through the hole or knock in.
eBay