Curt mechanically de-scales all hitches before applying a thick powder coat finish leaving an attractive high-gloss, smooth surface. Curt features WeatherTite construction which seals the main body of the hitch. All Curt hitches come with mounting hardware and easy to follow installation instructions. Class 3 hitches have a 2 inches receiver opening, and rate up to 8,000 pounds gross trailer weight (GTW) and 800 pounds tongue weight (TW).