Precision
1.25" OD Rack and Pinion Focuser that most telescope users
will ever need. Durable corrosion proof plastic base and draw tube
with eyepiece holder for 1.25" OD. Dual knurled focus knobs
turns easily, ensures precise focusing, no back lash and has 70mm
focus travel. Comes along with standard adapter to Fit on Newtonian
reflectors for tube dia 110mm, 140mm, 200mm, 250mm and 50mm, 63mm
for Refractors. (Specify the size of your tube).
A worthy component for a home built telescopes.