This is a new reproduction gauge set for the early jeeps. This is a 12 volt set. It will fit the MB, GPW, CJ2A, CJ3A, and early CJ3B. This gauge set is like the originals and requires exterior illumination. These gauges have the solid metal housings with no windows like the original M-series gauges did. This kit contains a 12 volt fuel gauge, Amp gauge, Mechanical temp gauge, and Oil gauge. You will have to plumb the oil gauge like in the early jeeps.