The Tower Model Three Tier stand is made of all aluminum which makes the stand incredibly strong so it is able to withstand 264 lbs of weight. The two arm assembly comes with 1 straight base, 1 inclined base of 10 degrees, 1 pair of 17.7 inch straight arms, and 2 pair of 15 inch straight arms. The STAY Music Keyboard stand Tower Model is the cutting edge in keyboard stand design. Not only is the STAY Music stand strong, but it is incredibly stylish as well! Includes sturdy carrying bag.