Chapin Pro-Series Backpack Sprayer For Fertilizers, Herbicides and Pesticides with 4-inch wide mouth opening for easy filling and cleaning. 4-Gallon translucent tank with 4-inch wide mouth opening for easy filling and cleaningCompatible with common fertilizers, weed killers and pesticides3-Stage Filtration system with in-tank removable/cleanable filterCushion grip poly shut-off with three nozzles for a variety of applicationsPadded shoulder straps to accommodate a full backpack for hours