RiaTech Heavy Duty 25 inch Universal Projector Ceiling Mount Bracket - White Brand: RiaTech Color: White Description  For projectors with 4, 5 or above mounting holes on the top. Please measure the maximal diagonal distance of any 2 holes of all mounting holes on the top of the projector; it should less than 14.2 inch.   For projectors with 3 mounting holes on the top. Please measure the maximal distance of any 2 holes on the top of the projector; it should less than 14.2 inch.  Please check your ceilling wall, is it concrete wall or regular wall ? The Ceiling plate dimensions: 3.1 inches x 3.1 inches (square), make sure your wall could be installed.  Warranty: 1 Year Warranty By SaiTch IT on All Products