HURI 5 Pulley Chain Tensioner Roller for Motorized Bicycle Bike 49cc 60cc 66cc 80cc 2 Stroke Engine Replacement parts,non original Fit motorized bicycle bike 49cc 60cc 66cc 80cc 2 stroke engine Package include 5pcs pulley chain tensioner rollers + 1pc HURI pocket tape Note:you could apply for a full refund if you didn't receive HURI branded pocket tape.