4 stroke power sprayer is spraying devices which are widely used in various farms and fields to prevent the crops from pests. The device is widely applicable for spraying on cotton, rice and various other fruits and vegetable crops. These knapsack power sprayers product can store up to 20 litres of chemicals.? High-pressure piston pumps are used for achieving proper air pressure in the device. Knapsack power sprayer is used for spraying purposes. Suitable for all crops including tea and coffee plantation orchards, etc.