12 Tires; Trailers and structural parts therefor; trailer parts and accessories, namely, hitch balls, ball mounts, combo ball mounts, couplers, tow bars, hitch adapters, hitches, receiver tubes, hitch pins, hitch locks, jack casters, bumper steps, pintle hooks, pintle mounting plates, tow hooks, safety chains and cables, axles, hubs, fenders, and ramps