D.B. Smith Field King 190328 Backpack Sprayer, 4 GallonInternal No Leak Pump design is safer to use chemicals will not drip down your back. Internal piston pump delivers up to 150 PSIDurable, 21 inch poly wand with the highest quality Viton seals can be used with Wet table powders and liquids for all applications does the work of both a piston and diaphragm backpackPremium, lockable shut off with brass components and an in-line filter.Easy access pump allows changing of seals in just minutes with no tools4 nozzles included: brass adjustable, 2 flat fans, and foaming nozzle. Also accepts Tee Jet nozzles.