Chapin Professional Farm and Field Viton 3 Gallon Sprayer - XP Model (21250XP) offers 40% more pump volume per stroke and it is specially designed for use with farm and agriculture industries. It's constructed from durable and lightweight polyethylene material which are non-corrosive to most pesticides, herbicides and fertilizers. This 3-gallon sprayer includes brass extension, brass shut-off, pressure relief valve, metal industrial pump handle, reinforced hose, and a special lock-on feature to help reduce fatigue. It also highlights Viton seals and gaskets to ensure key areas will be secured and SureSpray anti-clog filter to keep debris from getting in the nozzle, shut-off and hose. It has a funnel top which allows you to clean and fill it easily.