Projector Lift Model B550 Features: 1) Made of heavyduty steel, suitablefor CRT/LCD/DLP projector,etc. 2) Accurate positioning, easy operation 3) Max running distance:430cm 4) Max loading capacity: 50kg 5) Body dimension when closing: 55 X 45 X 72cm 6) The size of auxiliary decor chassis:50 X 50 cm Inner packing: N.W.:50kg Outer packing: 1pc/wooden box G.W.:60kg