Compartments for 4 units and accessory. Interior and cover (not removable) upholstered with foam and black felt cover. High-quality workmanship with 9 mm plywood multilayered glued, black laminated. Aluminum profile frames (30 mm) with rounded edges. Three-leg, medium-sized steel ball corners (chromium plated). 4 castors, 2 of which with locking brakes. 2 large butterfly locks (with locking function). 4 hinged, chromium plated case handles. Caution! Units must be cooled down to room temperature!.