Constructed from 6061-T6 aircraft aluminum Easily collapses without tools utilizing "HEIM" joints and turn knob design One of the most RIGID towers on the market 360 degree unobstructed visibility for driver and passenger Large 1 7/8" diameter tube for 'FAT' look All accessories available ALL TOWERS ARE CUSTOM ORDERED FOR YOUR BOAT SO PLEASE ALLOW FOR TIME TO MAKE AND SHIP YOUR TOWER. WE WILL ALSO NEED MAKE AND MODEL OF THE BOAT.