This leveler adjusts the height of one end of the Vernier Dynamics Track, turning it into an incline. You need two to make the track level.
Two of these parts are included with Combination 1.2 m Track/Optics Bench, Combination 2.2 m Track/Optics Bench, Dynamics Cart and Track System, Dynamics Cart and Track System with Motion Encoder, and Dynamics Cart and Track System with Go Direct® Sensor Cart.
