Brand New High Quality - Brass / SS 0.012 inches (0.3 mm) orifice, 10/24 threads Misting Nozzles. Leak-proof, self-sealing o-ring included with each nozzle; no tape or sealant is required. The Brass and Stainless-Steel Mist Nozzle is the most efficient and water conservative mist nozzle available today. It only uses one-half gallon per hour per nozzle and features a sturdy brass body with stainless steel orifice. The Brass and Stainless-Steel Mist Nozzle is the most efficient and water conservative mist nozzle available today. It only uses one-half gallon per hour per nozzle and features a sturdy brass body with stainless steel orifice.