The Mini-Manometer Pressure Gauge Luminescent Dial reads from 0 to 5000 psi. For At-a-Glance Monitoring of Air Pressure the Instruments Face is divided into three different Colored Zones: the area from 600 psi and below is Highlighted-in-Red with a Solid-Bar and Red Stripes. If Gauge is used on Deeper Dives, the Red-Scale Extends and fades to 1,300 psi, this provides for Added-Reserve-Air Indication required at Greater-Depths. From 600 to approximately 3,000 psi is Green and from 3,000 psi to end of scale is Blue. The Front Glass Lens is made to act as a Pressure Relief Valve. In the event of a sudden Increase-in-Pressure inside the Instrument, the Glass-Rises-Slightly, allowing the Excess-Pressure to Escape. The Instrument is Housed in a Small, Modern Shaped Boot, made from Polycarbonate and Desmopan, (a Thermoplastic Polyurethane) two materials that guarantee protection from Shocks, Scratches and which, at the same time, is very Lightweight. The Pressure Gauge Housing is Durable Chrome Plated Brass. The Gauge Boot has an Attachment Point for a Clip or Lanyard Pressure Gauge is equipped with a 7/16" Threaded High Pressure Hose, is made in Italy and is covered by a 12 month limited warranty.