Premium Stands with Air Cushion. Auto Lock Ratchet System. Carry Bag IncludedAdjustable Height: 1250 – 2000mm Maximum Load: 40Kg Tube Diameter: 35mm Weight: 3.7Kg (Per Stand). The Novopro SS3R speaker stand has been designed for ease of use as well as safety. The stand has the patented auto-lock ratchet and air cushioning system which allows you to adjust the height and lock the stand to that height without the usual slipping and inconvenience of standard speaker stands.. speaker stand-air break speaker stand