Unused in mint condition in the original military packaging. Complete prism cluster (right side) for your M8 (and many others) 6x30 binocular! Well made mounted two prism erecting assembly is what you need for building a spotting scope or monocular. Two mounted porro prisms, 2 inches long by 1 inch high. Assembly is 2-1/2 inches thick by 2-1/2 inches diameter and the view openings are 1 inch diameter. Coated optics, unused!