Most high quality 1930s radios were made so the chassis could “float” on rubber washers mounted inside the cabinet. These washers are often deteriorated or missing, causing acoustic feedback, misaligned control shafts, or misalignment of the radio’s dial inside the bezel. These are the mounting washers used for Zenith chassis. They are 1.25″ round and 1/4″ thick. Sold in sets of four for $6.00.