Heavy-duty adjustable steel construction with double square tubular cross supports. Patented push-button quick-release mechanism for easy operation. Non-marring pads on support arms. Will accommodate second keyboard with optional stacker 18941 or boom arm and music desk. Adjustable end cap to stabilize the stand on uneven surfaces. Maximum load capacity: 40 kg, Wt: 6.0 kg, H: 480/1000 mm, W: 230/895 mm, D: 350 mm.