Perma-Cal 4.5 in. Precision Test Gauge with 0.25% Accuracy and 0-30 PSI. This gauge has 1/4 in. NPT, front flange, bottom fitting, stainless steel trim with mirror band; it includes dampening and external zero adjust. It comes in a black case with NIST calibration certificate.
The dial size shown in the photos may not reflect the actual PSI range.