These sprayers were designed to apply commercial cleaners (including solvent based), degreasers, oils, stain removers and waterproofers. Pressure relief valve. Viton® seals for chemical-resistance. Reinforced hose. Brass flow control with lock-on feature. Brass wand with brass flat-fan patterned nozzle. Carrying strap on 1962VI and 1963VI. Available in 1 gallon, 2 gallon and 3 gallon capacities.