Need to monitor pressure in a system? This CARBO gauge is a reliable, straightforward tool. It has a 2-1/2 inch dial (that's the diameter of the face) housed in a tough chrome-plated steel case. The gauge reads from 0 to 15 psi, and it also has a dual scale showing kilopascals (kPa) for metric users. It's a \dry\ gauge, meaning the interior isn't filled with liquid (like glycerin), which is fine for many applications. The connection is a 1/4\ National Pipe Taper (NPT) male thread on the *lower* part of the case, so it mounts from the bottom. It's designed for use with common media like water, air, oil, in compressors, hydraulics, or HVAC systems – basically, anything that's not super thick, crystallizing, or corrosive to the brass/copper alloy parts inside. It meets ASME B40.1 Grade B standards with an accuracy of ±3-2-3% of the span. The movement is a classic Bourdon tube type, and it has a glass lens. A solid, no-frills gauge for workshops, DIY projects, or industrial use where you need to keep an eye on pressure.