Create maximum workspace with functional panels that slide vertically, saving time and effort, and allowing you to control your lesson with increased flexibility. Available in floor or wall mount units, either surface or recess mounted. Floor mount unit includes kick panel with a .5" lightweight substrate available in a variety of finish materials. Floor mount units include full-length aluminum accessory tray with box corners. Panels are precisely counterweighted for silky smooth operation. Made to military specifications (MIL-DTL-7034/4) with solid steel ball bearings and sheaves, the pulley mechanism is an aircraft-quality anti-friction control for the stainless steel cable that connects the counterweights to the panel. Full-length pull handles, top and bottom, included. Standard units include a .5" porcelain steel dry erase markerboard back panel with .75" honeycomb core porcelain steel sliding panels, individually counterbalanced for smooth operation. Call for information on other available surfaces. Frame is heavy gauge 6063-T5 aluminum alloy extrusion. Corner miters are reinforced with aluminum angles for stability and durability. Frame measures 4"W x 3.63"D for one-track systems, 4"W x 6.13"D for two-track, and 4"W x 8.63"D for three-track.