This is reproduction set of radio knobs to fit later shaft-style car stereos, including Retrosound, Kinwood, Blaupunkt, Alpine, and other replacement shaft-style car stereos. The inside knobs are chrome plated steel with a "double-D" configuration. The outer knobs are plastic and fit "split-shaft" configurations. May not fit original VW radios, depending on year. If you want to use these on an original VW radio, check your shaft configuration before purchasing. Brand new surplus.