Fits onto any hose end and delivers up to 20 gallons of finished spray. Features a built-in anti-siphon feature to prevent backflow, fingertip on/off control, and a durable, chemical-resistant and rustproof polyethylene construction. Removable fan-spray nozzle for quick coverage of large areas or a continuous stream for more direct application. It automatically mixes liquid concentrate with water. Works with all water soluble fertilizers and weed killers