A converter from 300-bar DIN to CGA347. Since 300-Bar DIN systems and CGA347 breathing air packs both operate at similar pressures, direct connections from scuba DIN to SCBA CGA 347 can be made. This adapter converts a 300-Bar DIN fill whip to one allowing the filling of hi-pressure CGA 347 and regular CGA 346 SCBA units directly. 4,500 psi service. Air service only.