This is the same as part number HA1180 and G14490. It comes with the fitting shown in the photo. Upgraded to LARGE 2 1/2" diameter Air Gauge 0-15 psi HA1180 or part# G14490 This 2 1/2" diameter air gauge can be used to test ALL low pressure portable oil fired heaters 0-15 PSI. This is what all service technicians use to set the pressure on heaters. The first step in diagnosing a sick heater is to see what the pressure is, and with this LARGE 2 1/2" diameter gauge, its easy to see.