The No. 50P Poly Sprayer is constructed of high density polyethylene. The nozzle is adjustable and the flow rate is controlled by a thumb lever. It comes with a 7 poly ethylene pump and has a 3 pint working capacity. The No. 50P Poly Sprayer can be used for spraying solutions of CalClean , Special HD CalClean , Alka-Brite Plus, Nu-Brite , and other quality Nu-Calgon coil cleaners on air conditioning cooling coils, air-cooled condensers, finned heating coils, refrigeration case or cooler coils, permanent air filters and other greasy, dirty surfaces.