Almost all the mountain bike road bike derailleurs can use it Total Capacity: 11T Color: Silver/black/red/purple/green Material: steel bearing + 7075 aluminum alloy Product size is about 4cm in diameter Package Contents: 1xCeramic Palin rear dialOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.