- Triple wall tube (sturdiest in the industry), 2" to 3/4" 304 Marine Grade Stainless Steel Construction - Durable 1" thick plastic stair tread - Comfortable 1 1/4" wide steps - Large 15" X 15" underwater platform (patent-pending) at bottom of ladder (15" X 11" on 12" ladders) - Our patent-pending QuickTrieve return system brings it out of the water with the pull of a handle - Available in 2, 3, 4, 5 or 6 step designs - Will support 300lbs as long as you have a solid backing plate mount to your boat