Steering Box Worm Shim 54-72, Stainless Steel 0.15mm. Genuine VW. 211-415-175 211415175 £3.50 Quantity: at £3.50 each Add To Basket 0.15mm thick NOS genuine VW steering box shim. Fits all Splitscreen and early bay window steering boxes. These are the shims at the bottom of the worm that determines the end float on the worm. Volkswagen shimmed them box by box so all were different, but as a general rule one of each of the 3 kinds of shim should be plenty to give full adjustment if new bearings are being used.