The Solo 475 Backpack Sprayer features a high-density polyethylene tank with ultra-violet inhibitors that allow for unmatched durability and ultra-violet protection. Large 4.25" opening with filter basket. Shut-off valve and wand overall length of 28" for hard-to-reach places. 4' of high-pressure hose. Padded shoulder straps for greater comfort. The model 475 is capable of producing up to 60 psi with its rugged connecting rod actuated diaphragm pump. The diaphragm is made of high-quality Viton for its resistance to harsh chemicals and abrasion and its long life expectancy. By design the diaphragm is able to pass small abrasive particles without damage to the pump assembly. The diaphragm pump is ideal for handling chemicals in wettable powder form as well as liquid formulations. 4 gallon capacity. White.