Neptune Packaging Private Limited manufactures Dual Chamber Knapsack Sprayer. Neptune Packaging Private Limited is an ISO 9001-2000 certified company offering a wide range of sprayers, pump, Duster, Fertilizer Broadcaster, Herbal Medicines, Pharmaceutical Drug and Veterinary Medicines. The Dual Chamber Knapsack Sprayer is mainly used for spraying different types of pesticides. The Dual Chamber Knapsack Sprayer is made from plastic and possesses a double chamber with a capacity of 16 litres.