The go-kart drive belt used on most Manco, American Sportworks and Ken-bar Karts with 5hp - 7hp engines 30 Series belt is also used on the Comet TAV2 bolt on torque-a-verter kit Center to center spacing for the driver and driven pulley needs to be between 6 5/8" and 6 11/16" Instruction are not included; professional installation is highly recommended Width: 0.75" Length: 27-1/32"