Roundup PRO 190412 No Leak Pump Backpack Sprayer for Herbicides Internal No Leak Pump design is safer to use - chemicals will not drip down your back. Durable, 21 inch poly wand with the highest quality Viton seals for chemical resistance. Premium, lockable shut off with brass components and an in-line filter. Easy access pump, change seals in just minutes with no tools. 4 nozzles included: brass adjustable, 2 flat fans, and foaming nozzle. Also accepts TeeJet nozzles.