Stacker. Optional stacker for 18930 and 18990, fully adjustable in height, depth and tilt to accomodate various types of instruments. All-metal construction, black powder-coated. Big non-marring pads to protect the keyboard. The new all-metal teeth locking devices ensure tight non-slip settings at any position. Height: 290 mm. Support Depth: 340 mm. Weight: 2 kg. Colour: Black.