A finned back wall stands alone, requiring no attachment exept for at the court sidewalls and at the concrete slab below. At both these locations (sides and floor) the glass is located in an aluminum U-channel that is fixed to the substrate. A finned back wall consists of four glass panels and one door, all fabricated of 1" (12mm) tempered glass. The purpose of the fins is to aid in the distribution of impact on the glass wall panels into the concrete below. All walls are delivered complete with all fittings in aluminium, white powder coated.