- Triple wall tube (sturdiest in the industry), 2" to 3/4" 304 Marine Grade - Stainless Steel Construction - Durable 1" thick plastic stair tread - Comfortable 6" wide steps - Large 6" X 10" stairs at a comfortable 60 degree vertical angle - Our patent-pending QuickTrieve return system brings it out of the water with the pull of a handle - Available in 4, 5 or 6 step designs - Will support 400lbs as long as you have a solid backing plate mount to your boat