DUAL SCALE PRESSURE/TEMPERATURE GAUGE/HOWE TRIDICATOR SIZE 3" DIA [RANGE 50-290F, 25-140C] [ 0-200 PSI ] [ 0-1400 KPA ] BOTTOM MOUNT 1/2" MPT, 2-1/2" PROBE Case: Black Steel case Lens: Glass Pointers: Aluminum black Dial: Aluminum, white with blue and red scales Movement: Brass Bourdon Tube: Phosphor Bronze This OEM Hatco part fits most Hatco Booster Heater Models, but here is a list of the specific models in which this part is specified: PMG-100 PMG-200 PMG-60 TEMP FLAGGED AT 285 DEGREES