Hypro 5330C-X Piston Pump (Leather Cups)Many different spraying, pressure cleaning, and hydrostatic testing applications require the use of a high quality piston pump. This model from Hypro features stainless steel ball bearings and valves along with fabric reinforced or leather Buna N or straight Buna N cups. This cast iron piston pump is built to stand up to fluid handling applications using water as well as non abrasive, general use chemicals.