LUMAX LX-1327 Lever Action Chemical Pump (Premium). Ideal for DEF/Urea/AdBlue. Manufacturer: Lumax. Ideal for DEF/UREA/Ad Blue. (500 mL) per Stroke. 8 Strokes/Gallon (3. Adjustable output setting (Low, Normal, High) on the handle allows the user to regulate outflow. ).