Clearsonic Ax2412X6 Wide X 12''High 6-Section Csp Height Extenders With H-ChannelAX2412 Height Extenders add 12 inches of height to standard CSP systems. H channel and hinge are included. The AX2412x6 is normally used to increase the height of an A2466x6 or A2448x6. When its time to break down, CSP systems with AX height extenders installed correctly will still fold accordion style for easy storage.