•  If your Oil Sight Glass does not have the small red dot and is approximately 1 inch in diameter with an O-Ring gasket then you will need to order the 51111-4770T Oil Sight Glass.

• This Sight Glass was used on the P series PS25, PV05A, PT03A was used on various brands of air compressors including both electric and gas powered oil lubricated single stage air compressor, 2 stage air compressors, portable air compressor, direct drive compressors and stationary air compressors as well as many oil free hand carry air compressors.