Pressure Sprayer Knapsack 16 Litre Manufactured from shatterproof and frost resistant materials and equipped with a pressure release safety valve. The spray lance has an adjustable spray nozzle with a trigger lock for continuous use when required. The 16L easy carry knapsack sprayer has a 'pump as you go' pressure action that makes light work of those big spraying jobs. The large capacity makes this sprayer ideal for use in the bigger garden.