Wheel your trailers around easily without needing to hook up to a vehicle with the Trailer Dolly from Extreme Max Products. Perfect for boat trailers, snowmobile trailers, cargo trailers and more. The dolly uses its all-steel frame construction to support any trailer with up to a 600 lbs. tongue weight. Underneath, the 10" x 3.5" pneumatic tires make moving the load easy, even on rougher surfaces. On top, the dolly features a 1-7/8" hitch ball that will fit most trailer couplers. The whole unit is powder coated to protect against rust and other damage and is built to last many seasons of trailer moving. Specifications: Ball height: 16"; Total length: 47-1/4"; Width: 25-1/2"; Weight Capacity: 600 lbs. Tongue Weight. Note: For use on hard, dry, level surfaces. Do not surpass 600 lbs. tongue weight capacity.