XS Scuba DIN Valve 7/8"-14 UNF Threads. 

Features: 

• Dedicated 300 bar DIN outlet
• Attachment of DIN first stages only
• 7/8”-14 UNF standard inlet threads
• Air service only
• 1.5 handwheel rotations from fully on to fully off 
• Can be used on 3500 psi old HP steel cylinders (must change safety)