Photos added. Inner diameter 8mm. TAMA cymbal hardware, Tama Reversible Cymbal Bottoms, 2 pieces. The packaging is torn, but the items are new. 1. These items have been stored in a warehouse for a long time, so their condition is as expected. Also, everything in the photos is included. Please refrain from purchasing if you expect items to be in new, unused condition. There are minor scratches and small marks. 2. To reduce costs, we use recycled packaging materials. Thank you for your understanding. 3. Returns are not accepted. Also, shipping will primarily be on weekends, so please be aware of this. We appreciate your understanding. 4. We also have many other drum hardware items for sale. Please take a look if you're interested. That's all.