AX2418 Height Extenders add 18 inches of height to standard CSP systems. ‘H’ channel and hinge are included. The AX2418x3 is normally used as an ‘add-on’ to increase the width of an existing AX2418 system by 72 inches or to increase the height of an A2466x3 or A2448x3. When it’s time to break down, CSP systems with AX height extenders installed correctly will still fold ‘accordion style’ for easy storage.