4 Gallon, Backpack Sprayer,Diaphragm Pump, With Carry Handle, Features A Large 4.25" Opening With Filter Basket, 28" Wand & Shut Off Valve Assembly, 4' High Pressure Hose, Padded Nylon Shoulder Straps, Capable Of Producing Up To 60 PSI, Diaphragm Is Made Of Top Quality Material For Its Resistance To Harsh Chemicals & Abrasion, Diaphragm Pump Is Able To Pass Small Abrasive Particles Without Damage To The Pump Assembly, Ideal For Handling Harsh Chemicals In Wettable Powder Form As Well As Liquid Formulations As Well As Bleach Solutions.