The 4770-2 No. 100P Poly Sprayer is Constructed of High-Density Polyethylene. It has a Funnel Top which Provides for Easy Chemical Pouring and has a 1 Gallon Working Capacity. It comes with a 10" Polypropylene Pump, Brass Handle and Extension Wand with Adjustable Nozzle, a Wear-Resistant Hose and a Pressure Relief Valve. The No. 100P Poly Sprayer should be used for the Dedicated Spraying Cal-Shield on Air Conditioning Cooling Coils, Air-Cooled Condensers, Finned Heating Coils, and Refrigeration Case or Cooler Coils that have been Cleaned with Cal-Brite, Nu-Brite, Alka-Brite Plus or any other Nu-Calgon Coil Cleaner