Diameter: 1.25 inches
Height: 1.06 inches
Tungsten ring with drilled holes for balancing
Super Grip Aluminum Spindle
Tungsten Carbide Bearing
This Dynamo has a tungsten outer ring that has drilled holes on the underside of the ring for balancing and a super grip aluminum spindle that houses a tungsten carbide bearing. The top weighs in at 51 g. It has reported spin times over 20 minutes.
Due to the inherent issues with tungsten the top may have some flutter near the end of the spin even after being balanced.