Gravity SP 2472 B, Adjustable Spacer Tube with Crank, 35 mm Spacer tube with M20 screw thread, Crank mechanism for easy lifting and lowering of the speaker, Length variable from 1.02 to 1.64 m, Load capacity: 40 kg, Material (pipes): Powder-coated steel, Material joints: Metal, Weight: 3.3 kg