Earth River SUP Hand Held Pressure Gauge For Inflatable Stand Up Paddle Boards (with Standard Halkey-Roberts Inflation Valve) Takes instant pressure readings without having to attach a pump hose. Let you know when the air pressure in your SUP board needs to be topped off. Reads pressure up to 30 psi (2.0 bar) Compatible with popular high performance Earth River SUP Sky Lake & Elite Inflatable stand up paddle boards and other brands, such as Starboard, Red Paddle Co, Hala, and Naish. Will fit many other popular inflatable paddle board brands including Tower, Isle, Jimmy Styks, and SUP ATX. Specifically designed for SUP inflation valves, so no adapters needed for most boards (notable exceptions are NRS and ULI which use less common Lealfield valves) Takes a more stable reading than in-line or built-in pump gauges and eliminates hose air loss. Large, easy to read readout, marked in PSI and BAR. Includes rubber washers in two thicknesses to compensate for slight variations in valve dimensions. Manufactured by Earth River SUP, a leading brand of high performance paddling and outdoor performance gear. Lifetime warranty with no hassle replacement. In the unlikely event of an issue, Earth River SUP wants you back on the water as quickly as possible!