Fiend Palmere Sprocket material: 6061aluminium | CNC machined size: 25 teeth teeth: 1/8 inch thickness: 6mm bore: 15/16 inch (23,8mm) for 24mm crank spindles adaptors: included for 22mm and 19mm crank spindles color: black additional information: compatible with the replaceable Fiend Havoc Guard. Sold separately.