SEAMODE Heavy Duty Trailer Dolly Made of heavy-duty galvanized with a black coated paint. Wheel your trailers around easily without needing to hook up to a vehicle with the Trailer Dolly. Perfect for boat trailers, snowmobile trailers, cargo trailers, and more. Material: Black paint-coated galvanized. 1-7/8" or 2" hitch ball that will fit most trailer couplers. 8" tires make moving the load easy. Handle Length: 15". Total Length: 50". Width: 30". Load Capacity: 600 lbs / 271 kg.