Chapin International 36678 Chapin 62000 Tree/Turf Pro Commercial Backpack Sprayer With Control Flow Valve Technology for Fertilizer, Herbicides and Pesticides, 4 gal, Translucent White Featuring control flow valve technology for a continuous spray stream at 21 psi and more efficient use of chemicals 4 gallon 4-inch wide mouth opening, translucent tank for easy filling and cleaning Compatible with Common fertilizers, weed killers and pesticides 3-Stage filtration system with in tank removable/cleanable filter Poly shut-off with 3 nozzles - fan, cone and adjustable brass. Padded shoulder straps with lumbar support and back pad