RUGGED DESIGN: The stainless steel components prevent rust and corrosion while the precision-crafted nozzle seamlessly seals onto the valve stems for highly accurate readings (±2% span). We also provide 4 valve stem caps for convenient replacement. MEASURES PSI, kPa, BAR; Measurement range from 10-75 PSI, 70-550 kPa, 0.7-5.5 BAR. Attention! Do not exceed the maximum pressure of the gauge, doing so will permanently damage the device. UNIVERSAL APPLICATION: Not only are these gauges easy to use, but include an integrated deflator valve, chuck, and ABS indicator bar CONVENIENT DESIGN stows easily in a glove box, tool belt, workbench, or even a pocket; the pocket clip makes it easy to carry with you while on the job Further service provided by AstroAI, BATTERY FREE means no maintenance and total reliability under all weather conditions; a necessary tool for roadtrips and optimal safety AstroAI pencil tire pressure gauge 2 pack (10-75PSI, ±2% Span) is a must-have tool for road trips and safe vehicle maintenance.