Each box of Maxforce Gel contains 4 pre-filled reservoirs ( four 30 gram reservoirs) for use with the masterline bait injector. It may be used as a spot or crack and crevice treatment for the indoor and outdoor control of cockroaches in residential areas and non-food areas of institutional... warehousing and commercial establishments... including warehouses... restaurants...food processing plants... supermarkets... hospitals... nursing homes... motels... hotels... schools... laboratories... computer facilities... sewers... aircraft... buses...boats/ships...trains... pet shops... and zoos. Non-food/non feed areas are ares such as garbage rooms... lavatories... floor drains...(to sewers) entries... and vestibules... offices...locker rooms... machine rooms...boiler rooms...garages... mop closets and storage(after canning or bottling).