SPS International Model 100 Triple Function Backpack Sprayer Repairable triple function piston diaphragm pump module Pump capable of generating 150 PSI of pressure (working pressure 15-80 PSI) Jet agitation for wettable powders Built-in check valve in the lid to prevent leakage from accidental tipping Complete spray gun with lock pin, brass spindle, filter and grip; comes with 51" PVC hose