The Chapin Industrial Viton Concrete Sprayer has a 3.5-gallon tri-poxy lined steel tank that provides triple protection against rust, corrosion and damage from denting. Featuring a large 4-inch mouth opening for easy filling and cleaning, brass wand, brass shut-off, brass fan tip nozzle for even coverage, a 48-inch reinforced hose with threaded fittings and Viton seals for most concrete sealer applications (check chemical manufacturers instructions before use). Our open head tanks have a unique Tri-Lock seal that insures the pump cap locks tightly into place.