High Pressure Resistance - It could resist working pressure up to 20-30 Mpa / 200-300 Bar / 3000-4500 PSI, with a gauge to indicate the pressure. Dual Gauge Design - gauge indicate tank pressure,the other gauge indicate the inline pressure. WIth 57 cm long stainless steel spring protection hose. Easy Installation and Quick Release - It comes with an 8mm female quick-release coupling plug, and it could be connected and released from other male fittings within seconds. Strong Compatibility - Mainly used for high-pressure gas cylinders, SCBA gas cylinders, SCUBA diving cylinders or PCP gas cylinders, easy to assemble and install, for air/carbon dioxide filling.