Henxlco Universal Extendable Adjustable Tilt DLP LCD Ceiling Projector Mount Bracket White Durable white finish; *Loading capacity 66 lbs (30 kg) Removable extension arm with variable height adjustment: 4.3" (without arm) and 16.9" to 25.6" (with adjustable arm) The maximum distance between any two holes is less than 14.2 in/360mm in diameter Compatible with projector has 3 holes pattern or 4 holes patte Notice: Please check your ceilling wall, is it concrete wall or regular wall ? Ceiling plate dimensions: 3.1 inches x 3.1 inches (square)