1. Material: iron + bearing steel + rubber
2. Purpose: adjusting the chain tightness
3. Applicable models: for Yamaha YFZ 350 Banshee 1987-2006
4. Note: please check the appearance, size and shape of the item carefully before ordering and then compare it with your original item
5. Weight: about 82 g
6. Size: outer diameter about 35 x 26 mm, inner diameter about 8 mm