PROLUBE GP2/ST/501/N 50:1 Ratio Air Operated Grease Pump. Dispenses grease at pressures up to 50 times the air inlet pressure (150 psi max Air pressure). All metal construction. Designed to work in tough conditions. Ideal for use in industry, workshop, farm, construction or as part of mobile grease system. Fully CNC machined with hardened wear-resistant moving parts. Reciprocating piston operated 2-1/2 inches diameter air motor. Fitted with a strainer at suction tube inlet for clean grease to the bearing. Comes complete with a drum cover, rubber-lined follower plate, 7-inch high-pressure grease hose, Z-swivel, and professional grease control valve. Recommended for use with light and self-collapsing grease up to NLGI no. 2. Working pressure: 30-150 PSI. Air consumption: 61 GPM. Grease output: 2.42 lbs./min. Noise level: 81 Db. Drum cover diameter: 15 inches.