"The musician treads on a mushroom-shaped button with his foot and thereby activates a button in the interior of the device through a metal lever. The mushroom button is mounted in an igus® bushing (DFM-0812-06). With maximum ruggedness of the construction, the operation of the button is very smooth due to the bearing in an igus® bushing. The advantages of using the bushing are: top-quality products, quick installation, long-lasting service life (2 million switching cycles) and the exceptional ruggedness. ”
Burkhard Georg Lehle, "Lehle Gitarrentechnik", Voerde