Description: Diameter Of Hole: Approx. 12mm Chain Adjuster Block Tensioner for Pit Dirt Bike ATV Good quality, made from the highest quality materials available Not easy to fade and will not rust. Condition: 100% Brand new Specification: Size: 75*30*10mm/3*1.2*0.4" Package Includes: 1 Pair Chain Adjuster Tensioner Block Note: 1. Please check as much as possible to make sure the item is the one that you need. 2. Please allow 0.5-1 inch difference due to manual measurement.(1 inch=2.54cm) 3. Due to the light and screen difference, the item's color may be slightly different from the pictures. Please kindly understand. Make sure you don't mind before you order