AC2 / Compact INT Knee board The included shaft

The included shaft

One removable 9’’ center fin

Tru-fit flex panel gives you the ability to adjust the vest to fit your specific body contours

A large area of mesh in the back panel promotes airflow for ventilation and drying

easily stowed package

AC2 / Compact INT Knee board The included shaft1st STAGE AC2: Simple piston 1st stage, a "work mule" that is affordable, simple, reliable and robust, suitable for intense use. This first stage is appreciated by dive centers and professional companies who consider it to be a very rentable tool, due to its low cost and practically nonexistent need for maintenance, as well as a surprising level of performance. Conical filter One 7 16 high pressure port (HP) and four 3 8 low pressure ports (LP).