I supply stainless steel counterweights for the following mounts:
Astro-Physics 900 & 1200
Losmandy G-11, GM-8
Williams GT-1 & GT-1HD
Three sizes are available. The actual weight varies with the mount's shaft size:
7-8 lbs. 1" x 6" dia. $75.00 plus shipping
15 lbs. 2" x 6" dia. $87.50 plus shipping
23 lbs. 3" x 6" dia. $99.00 plus shipping
These weights are made in a production CNC machine shop. Each weight has a bronze bushing that rides on the counterweight shaft. There is a spring-loaded brass non-rotating plunger between the locking knob and the counterweight shaft to prevent marring of the shaft.
Credit card orders can be placed through my web page. Or, you can contact me by email to arrange payment by check.