The apparatus consists of a pair of rails with Ø 4 mm terminals.
The conductor consists of a bar with plastic discs which is placed across the rails.
An alnico horseshoe magnet no. 331500 (not included) is used as a magnet.
When the conductor is placed on the rails and current (max. 10 A) applied, the conductor will be affected by a force making it roll perpendicular to the magnetic field and the current direction, i.e. along the rails.
Dimensions: 190 x 85 x 65 mm.