In several places in the car there are pipes for heating and ventilation.
Originally Volkswagen used a lot of PAP (paper/aluminum/paper) hose, but in addition to these hoses we also have a number of solid aluminum types, because the look is also important, an added advantage is that they are more flexible.
Under the related parts tab, other aluminum pipe diameters are listed and under the alternatives tab, the pipe of the same diameter but of a different material.
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