This Nitrous Express 15508 Liquid Filled Nitrous Pressure Gauge is the perfect addition for any performance racing car. It accurately displays the pressure readings in PSI and is designed to withstand up to 1500 PSI. This gauge is a reliable and durable option for any nitrous oxide system. The brand Nitrous Express is known for their high-quality performance parts, and this gauge is no exception. It is easy to install and use, and is a great way to monitor the performance of your engine.