That special press fuses a heavy-gauge top sheet, waffled back sheet and 1" (2.5cm) square edge-support channels into an aluminum shell. The shell is formed around a special treated and protected high-density composite core. The top surface is then coated with an electro-static powder-epoxy enamel bright white markings on a non-glare green background. Bounce response is so perfect its the only non-wood table top sanctioned for international tournament play. The Roll-Away/Playback Stockholm moves effortlessly on lockable 4-3/4" (12.1cm) industrial casters. Triangular-designed center transport base is of high-impact-resistant resin. Oversized legs move automatically during folding into half open playback position, or fully closed. Tournament net posts are integrated into the unit. Each has an individual thumb-wheel net tensioner. Cord-suspended net included. Shipped knocked down with simple assembly instructions.