Chapin 61700N 4-Gallon SureSpray Backpack Sprayer For Fertilizer, Herbicides and Pesticides 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 to accommodate a full backpack for hours