Complete 55 Gallon Spraymaster System Kit for a Six to Eight Stall Barn. Includes everything necessary for installation including the first Insecticide fill, 12 nozzles with tubing, nailers, ties and a Blue System Cover. Long Run 1/2HP - 140GPH. SprayMaster SM55 Automatic Spray System consists of a 1/2 horsepower electric motor-driven pump controlled by a solid state electronic timer that is programmed to dispense an insecticide formulation in the form of a very fine mist at specific intervals through special spray nozzles. The result is a state of the art, hassle-free solution to control of harmful flying and biting insects in and around horse barns and other livestock confinement buildings.