Rockville RVSM1 Pair of Near-Field Studio Monitor Stands w/Adjustable Height Studio Monitor Stands (Pair). Adjustable Height. Steel Construction. Nylon clutch for adjusting. EVA Pad on top to eliminate unwanted vibrations. Triple enforced steel base with ultimate sturdiness. Black Color. Weight capacity: 80 lbs. Adjustable height Range: 33-45 inches. Base: 17.7 x 17.7 x 17.7 inches. Top Plate: 9.05 x 9.45 inches. Tube Diameter: 1.5 inch - 1.37 inch.