This is a great product that I have used for years. It is a concentrate that you make into a spray or dip. Use your own spray bottle. This is a natural bug killer of lice, mites and the dreaded pigeon fly. Lasts up to 30 days. Add 1 oz. to a gallon and make your own spray. I mix 1 ounce to a gallon as a dip. I dip the birds up to their beak, into this warm water. While they are in the water, I spread their tail and open each wing to be sure the mix gets everywhere. When they are done, they are bug free. Permectin II 32 OZ.