LASCO 15-5445 Pacific Breeze Patio Mist System Brass Button Nozzle with Filter, 1/8-Inch, 10-Pack Patio mist system Brass button nozzle with 1/8-inch 10-24 screw thread with 85 micron filter 0.3 MM orifice Rated for .5 GPH at 50 PSI Stainless steel core