This universal single needle mechanical air gauge (Part Number: C20520) is a great replacement part. It features a black bezel and a white dial face. With a single input, it can simultaneously display air pressure from 0 psi to 150 psi in 10 psi increments, with numeric markings at 0, 50, 100, and 150 psi. The mounting hardware is included, and the installation hole is Ø2 - 1/16' [Ø52.5 mm] (gauge body min 2', bezel max 2.2').

Using this air gauge is easy. First, make sure you have all the mounting hardware included. Install the gauge through the Ø2 - 1/16' [Ø52.5 mm] hole. Connect it to the air source with the single input. You'll then be able to see the air pressure from 0 to 150 psi right on the white dial face. When using, avoid exposing it to extreme temperatures or strong vibrations. For maintenance, simply wipe the gauge with a soft cloth regularly to keep it clean. If you notice any issues, check the connections first and consider replacing it if necessary as it's a replacement part.