Roundup 190426 Commercial Backpack Sprayer for Professionals Applying Weed Killer and Fertilizer, 4 Gallon Very versatile sprayer - use for cleaning, sealing, fertilizing and controlling insects Heavy-duty poly wand with shut-off featuring comfort grip, lock for continuous spraying, nickel-plated poppet and an in-line filter Viton seals and gaskets throughout the pump and shut-off for long lasting chemical resistance Adjustable padded straps with waist belt and built-in lumbar support Includes 4 nozzles for ultimate versatility: adjustable brass, high volume fan, low volume fan and foaming nozzle