Square Plate, Plano/Parallel Diffraction

Vg Diffraction Grating Type Square Plate, Plano/Parallel Form Polished , 2/S Material Glass(?). Coating Metalized / 1/S Mount Aluminum Mounting Frame. Dimensions: Od 2.65″ X 2.65″ Can/A Thk .25″ Radius N/A Fl N/A ***MPN ***OEM Custom ***SKU*** GLS380