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.