Heavy Duty Double X Aluminium Keyboard Stand with Adjustable Width and Height Adjustable arms fit all keyboards, 1" Square double braced tubing for extra strength and durability -Position disk clutch with bullet-nose pull knob make for quick and simple height and width adjustments Adjustable playing height 23.5" to 38.5" and adjustable width of 12" to 33" Protective, non-slip rubber end caps and locking straps secure keyboard from movement during performances Folds flat for easy storage and transport.