Pay in 4 interest-free payments of $10.00 Learn more
Ships within 48 hours · Estimated delivery Aug 26 - Aug 31
480 in Diameter the stem is
AIRCRAFT-GRADE QUALITY - Crafted with premium aircraft grade aluminum
The 2 that I use are shown in the pictures
Coins 20mm
The Dimension are approx 2
Solids Of Constant Width - Variety of 3 shapes Material:Brass 480 in Diameter the stemSet of three Cones of constant width with one of each Triangle, Hexagon and a Heptagon. CNC machined in Canada out of brass or aluminum bar stock. Approximately 1" in diameter. These are non spherical solids that amazingly have constant width in every directionallowing them to roll smoothly. They are derived from two dimensional curves that were put into use by the 19th century German engineer Franz Reuleaux.