“EASY-LIFT” DELUXE ALUMINUM PNEUMATIC SPEAKER STAND WITH 1-3/8” (35 mm) CENTER TUBE. Innovative “Easy-Lift” height adjustment device allows to raise your speaker cabinet EFFORTLESSLY! Superior air-cushion design gently and safely lowers speaker cabinets eliminating sudden drops. Non-strip out height adjustment collar and leg joint hardware with block tightening clamp assembly. Solid, robust polycarbonate leg joint with nylon block tightening clamp and height adjustment collar provide strength and stability.