The GRACO 17C487 Endurance Chromex Piston Pump is a replacement displacement pump designed for use in GRACO airless paint sprayers. It is constructed from a combination of stainless steel, PTFE, leather, nylon, zinc-plated carbon steel, nickel-plated carbon steel, and tungsten carbide components, ensuring durability and resistance to wear. This pump is intended to provide reliable, long-lasting performance for demanding painting and coating applications.