ProChosen Universal LCD/DLP Projector Drop Ceiling Mount With Adjustable Extension Pole and Arms White Removable and extendable mounting arms, includes 3 inches extra extension adaptors, universal for most of projectors. Retractable height: without extension pole, 5.11 inches height, supports adjust from 15.74 -24.01 inch height, the maximum distance of the diagonals hole : 15.35 inches and 10.63 inches minimum distance. Durable high grade steel, lock in any position, horizontal or vertical, maximum affordable loading:33lb (15kg) devices. Flexible angle adjustment: tilt and rotate left and right 5 degrees, ceiling plate adjustable to 90 degree. Built-in cable management to conceal HDMI, audio and video cables, convenient for using and protecting the cables from damage. (Please do not hesitate to contact us if you have any problems about our products, we will solve the problem for you timely.)