We had these before and sold out. Just got a few more in. This item is a simple but effective 30 mm finder scope for your reflector or refractor. The entire assembly is 5" high x 6-1/8" long and 2-1/4" wide. It consists of an objective lens with a 30 mm clear aperture, optical tube, prism type star diagonal, adjustable eyepiece, wire crosshair and a mounting bracket that includes an integrated 3-point adjustment for aligning the finder to the main telescope. New. Limited quantity.