ARX2412 Height Extenders add 12 inches of height to AR CSP systems. ‘H’ channel and hinge are included. The ARX2412x1 is normally used as an add-on to increase the width of an existing ARX2412 system by 24 inches. When it’s time to break down, AR CSP systems with ARX height extenders installed correctly will still fold ‘accordion style’ for easy storage.