Boats, ships and sea-going vessels other than air cushioned vehicles; boats ships and sea-going vessels other than air cushioned vehicles and parts and fittings and structural parts and fittings thereof sold together as a unit; parts, fittings and structural parts, fittings and components for boats, ships and sea-going vessels other than air cushioned vehicles, namely, evaporative emission control devices consisting primarily of a deck fitting for filling fuel and a fuel vent, fuel overfill p...