The GRACO 24H842 is a wall-mounted, pneumatic piston pump package designed for dispensing oil from large totes (up to 275 gallons/1040 liters). It is constructed from zinc-plated carbon steel, aluminum, nitrile, polyurethane, and nickel-plated aluminum, making it suitable for handling a variety of oils such as motor oil, gear oil, ATF, and hydraulic fluid.