Mold Form Material

I went to Home Depot with the tire, looking for round things which might be used to make a mold. The diameter of the wheel that came with the Mark IIII is 2.58". I found a black end cap with an outside diameter just a bit bigger than the Mark III wheel. The black end cap has an inside diameter of 2.38" tapering down to 2.21", and the outside diameter is 2.72" tapering down to 2.70". I'm not sure exactly what size of pipe this corresponds to. I also found the white piece, which had an inside diameter a bit bigger than the outside diameter of the black piece. Bigger...
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Copyright 2006 by Dave Hylands