Accu-Gage RA30X (5-30 PSI) Right Angle Chuck Dial Tire Pressure Gauge with Hose Gauge has a full geared, precision movement with bronze bourdon tube; unlike piston-plunger-type gauges, the bourdon tube movement is not affected by changes in temperature, humidity or altitude Right angle chuck with flexible 11 inch hose between gauge and chuck for hard to reach tire valves Durable steel case with polished brass bezel, stem, pressure release valve assembly and a 2 inch dial 5-30 PSI steel case gauge (recommended for tire pressures 8-23 PSI) Needle holds pressure reading until released and a pushbutton valve bleeds air to desired tire pressure