Spraymaster 30 Gallon System, Long Run 1/2HP - 140GPH, Drum, Pump & Timer system only. SprayMaster SM30 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. Use SM30 for installations of 14 nozzles or less unless space for drum & pump is an issue. Increasing nozzle #'s means frequent refills of SM30 system Order Tubing, nozzles, Insecticide & Nailers/ties/clips separately.