Section 17 VEHICLES, AIRCRAFT, VESSELS AND ASSOCIATED TRANSPORT EQUIPMENT 87 Vehicles other than railway or tramway rolling-stock, and parts and accessories 87 16 Trailers and semi-trailers; other vehicles, not mechanically propelled; parts th 87 16 20 87 16 20 00 Commodity Code Description 87 16 20 00 00 - Self-loading or self-unloading trailers and semi-trailers for agricultural purposes