These are the acknowledged semi-auto backpack sprayers that are selling worldwide. These backpack sprayers are fulfilled the FAO requirement. It is the reason that the Cross mark PB-16 & PB-20 knapsack sprayers are widely used in the agriculture sector today. Global farmers and planters consistently give "Quality" & "Durable" comments on this PB sprayer.​ - ​The sprayers are suitable for heavy usage of herbicides, pesticides, fungicides, and more requiring sophisticated media (low volume spray to high volume spray. - In the package, we provide customer cone type spraying nozzles consisting of a lime green adjustable solid cone nozzle(LSA/4 (LG)) and a red adjustable solid cone nozzle cap(LSA/4/1(R)) which are ideally suitable for spot spray, selective spray, and P & D spray.