The GRACO 96G198 G3 Standard Grease Lubrication Pump is an electric piston pump designed for lubricating on-road vehicles and off-road equipment. It is constructed from materials such as nylon, Trogamid T5004-060, zinc-plated steel, carbon steel, alloy steel, stainless steel, nitrile rubber, bronze, and nickel-plated Alnico. Its primary function is to deliver grease efficiently and reliably.