The result of many years of research, Harnois Irrigation offers you the Harnois Booms, in particular, the MegaBooms and the Ocmis line. Used in conjunction with a traveler hose reel, our booms are equipped with high efficient low pressure spray heads. he amount of water that reaches the roots goes from 55% (high pressure cannons) to 92% with Harnois booms. This data was confirmed by researchers from the University of Washington. Select a boom that increases your profits.