Horse trailers, flatbeds, snowmobile trailers, livestock trailers and trailers designed for use in the agricultural and livestock industry, flatbeds, drop deck and double drop semi-trailers in the commercial industry, van-type semi-trailers, refrigerated trailers, truck beds, and boxes of all types, recreational vehicle trailers, open and enclosed car transport trailers, utility trailers, both open and enclosed, and dry freight trailers and accessories for racing car transporter vehicles, namely, engine mount dollies, tire carrier trailers, holders and trays for racing car parts specially designed for, and carried by, the transporter vehicle, namely, rear end gear holders, windshield holders, shock holders, gas tank holders, rear axle shaft holders, and nitrogen bottle storage trays, and ladders, steps, handrails and observation decks sold as integral components of racing car transporter vehicles