Steel. Black powder coated. The stock Fat Bob license plate mount holder is easy to improve upon. This slick black powder coated steel bracket installs high; directly below the rear fender; showing the rear tire for that power-look. Easy install to the seat bolt and left & right fender strut bolts. Installation hardware included. Incl. Large LED license plate light. Note: Designed for use with a license plate only. Not for use in combination with license plate frames.