MS-374 PVG RACING RINGS

Racing Rings consists of three rods one each of copper, aluminum
and PVC. When ring magnet is dropped down the PVC rod, it falls
unobstructed. When the rings are sent down either of the metal
rods, they experience a slower fall. The two metal rods create an
induced magnetic field to that adds resistance to the rings’ travel.
Since the metals are different, they fall at different rates.