To replace all of them you will need to order a quantity of 3.

1/4" male NPT x 1/8" female NPT brass bushing reducer for air compressors.

Old Part Numbers: SST-108, A14785Rubber air compressor isolators with screws, three (3) included.

Old Part Numbers: GA0125200, PG0125200BKAir Compressor Pressure Gauge, 1/8" MPT, Back-Mount, 200 PSI, 1.5" Face. Replace if misreading or broken.Specifications PSI: 0-200 PSI MPT: 1/8" MPT Dial / Face: 1.5" Back-Mount

There are several different air compressor cooling fan styles. Choose this if yours looks like this one. Replace if cracked or missing fins.