This is the Scubapro Standart Pressure Gauge 0-400bar With Boot For Scuba Diving Features: Standard-sized pressure gauge with a plastic case. Displays pressure 0-6000psi or 0-400bar. Comes with a rubber shock-proof boot. This traditional standard-sized pressure gauge with a plastic case is mounted in a shock-proof boot. It is offered in a 0Adeg version with a choice of 0-6000psi imperial or 0-400bar metric pressure scales.