The Dyna-Star air-powered grease transfer and injection pump offers higher flow rates against higher pressures than previous models. The rugged design combines a thick-gauge steel lower with an air motor for increased protection against icing. The Dyna-Star 200:1 Air-Powered Pump can reach a maximum operating pressure of 20,000 psi (1,379 bar) and secures 1.5 liters/min flow against 10,000 psi (689 bar) back pressure. There is also a 120:1 ratio option for a 12,000-psi (827 bar) maximum operating pressure, which provides 1.5 liters/min flow against 8,400 psi (579 bar). Both ratio options are built with standard length options for 400-lb barrels and 120-lb kegs.