Exclusive Bak-Pak® design allows for the easiest, most comfortable way to carry more for bigger jobs including large lawns, greenhouses, decks, patios and more! Powerful piston pump and Viton® equipped for greater chemical resistance. Designed for left or right handed pumping action and a comfortable thumb-operated locking poly control valve. Extra long 20 in fiberglass/poly spray wand with bonus nozzle system includes 4 different nozzles. 48 iv PVC power sprayer-style hose. Extra large fill opening prevents spills when adding chemical. Chemical-resistant straps with adjustable pads.