Tandem Hydraulic gear pump. .85 cubic inch/.52 cubic inch displacement per revolution. 3000 PSI maximum operating pressure. 3500 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.