This is the Lumicon 2" mirror diagonal with enhanced 96% reflectivity aluminum coating. It's threaded for 48mm filters and, according to Lumicon specs, features mirror flatness of at least 1/8 wave. It's in very good condition with a few minor cosmetic blemishes on the barrel that inserts into the focuser (from the set screw) and the where the eyepiece is inserted into the front barrel. Includes a cap for the eyepiece end. $119 including shipping in the continental US. Money order or personal check (10 day hold for check to clear).
Thanks for looking.