Showa Automatic Gear Pump The Showa MLA*W & MLB*W gear pumps are used with Piston Distributors to distribute oil at a cyclic or intermittent rate. These units require an external timing device. This unit allows you to inject lubricant at a frequency you desire. This type of pump also comes with a pressure relief mechanism. These pumps can be sold as a complete unit including (reservoir, pressure gauge, float switch, etc.) or as a pump & motor combination. MLA015W 0.15 liters/min MLA03W 0.3 liters/min MLA05W 0.5 liters/min MLB015W 0.15 liters/min MLB03W 0.3 liters/min