Brownell Boat Dolly, steel, 15.5-21.5" height, painted blue. The Heavy Duty Boat Dolly is low profile with 2.5" ground clearance. The frame is 32 x 35" and one pair of dollies can handle boats up to 8000 lbs. Adjustable height 15.5 to 21.5", adjustable width 35.5 to 43.5". 6 x 2" phenolic wheels with brakes and casters.