The Chapin industrial FKM concrete sprayer has a 3.5 gal Tri-Poxy lined steel tank that provides triple protection against rust, corrosion and damage from denting. Featuring a large 4 in mouth opening for easy filling and cleaning, brass wand, brass shut-off, brass fan tip nozzle for even coverage, a 48 in reinforced hose with threaded fittings and FKM 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.