Chapin 19069 3.5-Gallon Xtreme Stainless Steel Concrete Open Head Sprayer For Professional Concrete Applications (1 Sprayer/Package) 3.5-Gallon Tri-Poxy tank for durability and a 4-inch wide mouth opening for easy filling and cleaning Compatible for most professional concrete applications and extreme chemicals including Acetone, Naphtha, Xylene and Toluene (check chemical manufacturers instructions) Brass pump, wand, nozzle and shut off with lock on feature for continuous spraying Viton seals and gaskets designed to handle a variety of chemicals Unique Tri-Lock seal feature that locks the pump cap tight