4 GALLON BACKPACK SPRAYER, Model HD400

Poly piston pump - Volume: 900 ml and piston cup diameter: 45 mm.
Heavy-duty trigger valve.
Right-hand or Left-hand operation.
Quick-adjust padded shoulder straps.
Piston Cup: Viton® for HD400; Santoprene® for HD400blue
Internal mechanical agitator for constant mixing.
Metal bushings for long-life.
Comes With 3 Different Nozzles.
Large fill opening and deep strainer for faster filling, reducing chance of spillage.
Polypropylene UV resistant tank.
Ergonomic shape fits on the operator’s back for maximum comfort.
Internal valve prevents over-pressurizing the piston pump.
Stainless steel spray lance.
Easy maintenance – no tools required.
Dry Weight: 8.16 lbs. (3.7 kg)