Chief's 2PG high-pressure hydraulic gear pumps are constructed with aluminum center housing and cast iron plates. This product line features nine displacement sizes—0.24 to 1.52in3/rev (4.0-25.0 cm3/rev). It is equipped with the following as standard: SAE A-2 bolt mounting flange, SAE-12 inlet, SAE-10 outlet, and a 5/8" diameter straight shaft with a 5/32" key.