This focuser is my own own design which has been used on many of the scopes I've built. Both the Drawtube and the focuser shaft are mounted in shielded ball bearings for silky smooth action. The focuser shaft rides on a stainless steel strip attached to the back of the drawtube for long wear and smoother movement. The 3/16" diameter focuser shaft combined with the 2"focuser knobs provide extremely fine control. An adjustable set screw with teflon pad on the back of the focuser provides from zero to as much braking action as you want.
The height of the focuser, fully racked in, is only 1.25". The drawtube has a full 2" of motion to accommodate pretty much any eyepiece in your collection.
Price $150 shipped anywhere in CONUS.