Here you go.... right from the Hurst arts site and thanks for the
on the raptor:
Hurst arts excalibur page
Excalibur is 18,000 psi and dry so hard it's almost like a ceramic material.
Excalibur is made by a company called Gerrico. You can purchase it from Clint Sales at
Clint Sales and Mfg.. (note no online cart but all info on how to order there)
Excalibur cost $39.50 for a 50 pound box, and the shipping can cost from $9.00 to $24.00 depending on where you live.