The Additel 12X series pressure manifolds are designed for expanding pressure test ports during pressure calibration. The pneumatic pressure manifold has a built in filter to prevent contaminates introduced by the device being tested. Each manifold has four pre-installed hand-tight quick connectors. These pressure manifolds connect without the use of wrenches or Teflon tape, increasing your productivity when using calibration pumps, pressure controllers, deadweight testers, or piston gauges.