Tandem Hydraulic gear pump. 1.31 cubic inch/1.31 cubic inch displacement per revolution. 2500 PSI maximum operating pressure. 2600 RPM rated speed, 4000 RPM maximum speed. SAE A two bolt flange mount. #12 SAE inlet port with #10 SAE outlet port. Separate inlet and outlet port. 5/8" diameter keyed shaft. Right hand rotation. Aluminum housing.