'CSI' Very Superior quality. All sheet metal body with synthetic finish, Halogen bulb of 24V-250 watt A.C. shines through high resolution optics to project sharp images uniformly, fresnal condenser lens, 25x25 cm stage aperture, two-way acetate roller attachment, fixed square column with rack and pinion focus by knobs, and thermo control exhaust fan for cooling. Complete with acetate sheet.