... Special designed to conserve specifiction widely used on FRL, mini hand-pump, equipment where fittings space is limited. ... Special designed to conserve specifiction,widely used on FRL, mini hand-pump,equipment where fittings space is limited.Air service ... back+/-2.5%1/8"NPTDialConnectionPointerBourdon TubeMovement singlebrassaluminiumbrassbrass Mini. Pressure Gauge CBM- Centre Back Mount, Gardon Gauge