The WIWA AIRLESS SPRAY MODEL 28064 has been developed specifically for use with coarse-grained or abrasive materials of low to medium viscosity, such as zinc primers, solvent-based micaceous iron ore, glass flakes, printing inks, flame retardants, and materials containing concentrated pigments or fibers, due to its high displacement. The piston moves slowly even when working with a large nozzle hole, which also results in low wear and tear.