Apeks ATX40/DS4 + ATX40 octo

1st stage:
Dry sealed system for cold water.
No turret.
4 medium pressure ports 3/8 UNF
1 high pressure port 7/16 UNF
DIN version

2nd stage:
Pneumatically balanced system - reduces breathing effort
Heat exchanger for cold water diving
Integrated Venturi Control
Micro adjuster
Extremely efficient exhaust valve
Compact integrated exhaust
25% lighter than TX models
Comfo Bite mouthpiece - for comfort and to reduce jaw fatigue