Precision 125 focuser with a smooth adjusting rack-and-pinion design is ideal upgrade for a low-quality focuser or for home-built telescope projects Universal fit base made of durable plastic to fit Newtonian reflector telescopes of 4 aperture and larger Focuser accepts 125 telescope eyepieces Has 1-1516 of focus travel with a fully racked-in height of 3-14 Dual knurled focus knobs turn smoothly even with gloves on
