Black anodized billet aluminum. Constructed from light weight billet aluminum and equipped with replaceable 'slippery' Delrin slider on the outer most edge so you won't destroy your derby cover on the tarmac when you're digging deep in the corners. Includes stainless installation hardware. Direct replacement for the stock derby cover. Used with the 'narrow profile' outer primary covers as stock on all 19-up Softail and 2018 FLSB models. Fits other 2018 Softail models that are custom equipped with OEM 25701077, 25700913, 25700937, 25700941, 25701039, 25701040 or 25701043 'narrow profile' outer primary covers. Includes stainless steel screws. Note: Replacement Delrin slider MCS 985774