White nylon plastic polished to reveal a smooth matte finish.
About this Product
This 1:64th scale air cleaner set is the typical type seen on most older era Kenworths, and the occasional Peterbilt. The elbows are going to be 'long' when printed, to allow the builder or customizer to either sand them flush to the surface of the hood, or be inserted into a hole in the hood depending on your replica. This is a set of two, one for either side of the truck cab.
Note: This has not been printed as of yet by myself, but am confident it is printable as viewed.