Dynamo - Tungsten and Aluminum Spin Top w/ Super Grip Spindle & Ruby Bearing

Specifications:

Diameter: 1.25 inches
Height: 1.06 inches
Weight: 53g
Tungsten ring 
Super Grip Aluminum Spindle
Ruby Bearing

This Dynamo has a tungsten outer ring and a super grip aluminum spindle that houses a ruby bearing.  The top weighs in at 53 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.