RAASM: Ideal for dispensing medium/high viscosity grease. Suitable for long distance dispensing. Recommended when delivery of a greater quantity of grease with high pressure is required. Polyurethane seals, aluminum upper body suction tube, and carbon steel suction tube. 1/4” NPT (f) air inlet connection and grease outlet connection. Air working pressure: 90 - 120 psi. Air max pressure: 120 psi. Noise level: 81 dB. Suitable for 400 lb drums. Suction tube length: 37”. Suction tube external ø: 1.18”. 4.2 lb/min.