"If you need to move a heavy trailer, the Tow Tuff Heavy-Duty Adjustable Trailer Dolly is for you. Manufactured in powder-coated steel with a hammer tone finish, this four-wheel trailer dolly is designed for trailers up to 1,500 pounds. It has two large 18"" tires and two 10"" swivel casters, and the ball height is adjustable from 23-1/4"" to 37"". It works with 2"" couplers or larger."