Brand New Scooter Drive Belt 535 5M 15 fits :
Zappy, Sunplex, Vapor+, Tomb Raider, Bravo Black Box, Amplifier A7 And many other models
Drive Timing Belts are identified by three parameters and marked as follows:
The first number is the belt length (535mm / 21"), belt has 107 teeth.
The second is the pitch (5mm / 0.197"), the peak to peak tooth spacing
The third is the belt width (15mm / 0.59")