The pulleys have a 4mm push fit mounting which is suitable for use with wooden dowel. Pulleys are 5mm wide. https://elecena.pl/product/16395973/4mm-pulley-10mm-diameter 2020-04-06 https://elecena.pl/product/16395973/4mm-pulley-10mm-diameter 2020-09-01 https://elecena.pl/product/16395973/4mm-pulley-10mm-diameter 2021-03-02 https://elecena.pl/product/16395973/4mm-pulley-10mm-diameter 2025-07-09