2001-2006 Acura MDX Package Content Class 3 Trailer Hitch, 2" Receiver Tube Square Tube Main Body; Heavy Duty Carbon Steel High Gloss Black Powder Coated. No Drilling Required application. Introduction Class 3 Trailer Hitch, 2" Receiver Tube Square Tube Main Body; Heavy Duty Carbon Steel High Gloss Black Powder Coated. No Drilling Required application.