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.