DESCRIPTION 1. The scuba adapter is used for air test and air transfer. It is very easy to operate and bring much convenience to scuba diving, firefighting, medical facilities and mineral mining, etc. 2. It is 22inch in length, thus ensuring enough length to connect to the fittings on both ends. 3. It features quick release and quick locking. The whole procedure can be handled in a short time and even by non-professionals with great ease. 4. Stainless Steel Regulator Valve Gauge comes with International Standard connecting thread-M18x1.5 & 5/8-18UNF. 5. High pressure input regulator valve one-way safety valve readings up to 4500psi. SPECIFICATION - Import working pressure: 20-30mpa / 200-300bar. - Import connection thread: M18x1.5 or 5/8-18UNF. - Export link thread: Standard 8mm quick disconnect adaptor. - Connection: Filling hose with 8mm female quick disconnect adapter. - Built Material: Stainless Steel body, hose with spring protection wire. - Safety: Explosion-proof screw to ensure safe filling. NOTE Please check your tank thread before purchasing. INSTRUCTION FOR USE Suitable for 5/8''-18UNF or 7/8''-14UNF thread PCP Tank, with 6K burst disk, the working pressure is 0-4500psi/300bar Refill the tank through the one way foster when turn off the switch Use it with bigger tanks to fill your air reservoir via the output hose, turn off the switch and release the air after filling. Gauge 1 shows the pressure inside the hose when filling Gauge 2 always shows the pressure inside the tank