This is the rubber boot that locates on the bottom of the oil filler breather tube and prevent dust from entering the oil system.
VW Splitscreen Beetle Ghia Oil Filler Cap With Logo 111115485
VW Splitscreen Beetle Ghia Brake Fluid Reservoir Cap
VW Splitscreen Beetle 25hp 30hp Flywheel Shim 0.34mm 111105287
VW Beetle Splitscreen Transporter Ghia Carb Throttle Cable Clamp 111129921
VW Splitscreen Bay Beetle Ghia Type 3 Fuel Flap Rubber Buffers 111857145
VW Splitscreen Transporter Beetle Ghia Oil Pump Gasket Kit 8mm Stud