IMPERIAL 651-C Mechanical Manifold Gauge Set, 4-Valve. Valve readout options on our manifold gauge sets include options for either analog meters or digital displays. Here are some important details for Imperial Mechanical Manifold Gauge Set. The item "NEW IMPERIAL 651-C Mechanical Manifold Gauge Set, 4-Valve" is in sale since Friday, November 8, 2019. This item is in the category "Business & Industrial\HVAC & Refrigeration\HVAC & Refrigeration Tools\HVAC/R Gauges & Probes".The seller is "mpcdogs" and is located in Merrillville, Indiana. This item can be shipped worldwide.