The Weathermatic B18-T has a third of a circle spray pattern nozzle (120 degrees). They are made of high quality milled brass that is incredibly resistant to wear and tear. Weathermatic products are designed with efficiency in mind. The typical 1/2-acre commercial property uses about one million gallons of landscape water per year. On average, properties exceed the landscape watering need by about 38% - or 380,000 gallons. Many properties overwater by as much as 60%.