Posted by Randy Ortiz on January 17, 2002 at 15:45:11:
A non-reactive rock hard (82-84 durometer) urethane with a medium RG medium Diff two piece weight block. Great for torched lanes and spares. Dark color - preferably black. Shouldn't be too much trouble to make - sell for around $125.00 max.
Give it a jazzy name - Hack Saw or Rip Saw - whatever - just make it.