Magnehelic Differential Pressure Gauge (0.5-0-0.5″w.c.) with Bezel provides flange for flush mounting in panel. Clear plastic face is highly resistant to breakage and provides undistorted viewing of pointer and scale and the precision litho-printed scale is accurate and easy to read. Red tipped pointer of heat treated aluminum tubing is easy to see. It is rigidly mounted on the helix shaft.