The 3D Projector Stacker is a mounting solution for front or rear projection stereoscopic 3D displays. Designed with two cradles to mount two projectors in either a tabletop or inverted format, the 3D Projector Stacker offers easy and efficient fine-tuning with several adjustments for image alignment. - Sturdy aluminum construction with steel projector cradles - Available with two shelf sizes to accommodate the most common projectors: 10” X 19” and 19” X 33 ½” - Optional filter holders and cooling fan accessories for use with polarizing filters