New belt for 535 -5M/15 Belt for Zappy Sunplex Vapor+ Tomb Raider

also fits PaceSaver Plus II Titan, Plus III, and Passport

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")