VERY100 Brass Misting Nozzles for Cooling System 0.012" (0.3 mm) 10/24 UNC Garden Pack of 20 Brass / SS 0.012 inches (0.3 mm) orifice, 10/24 threads Misting Nozzles Operation Pressure: 20-70kg/cm.Flow Rate: 80-145ml/min Minimal water use of 1/2 gallon of water per hour per nozzle 20pcs misting nozzles Leak-proof, self-sealing o-ring included with each nozzle; no tape or sealant is required NOTEVERY100 is the brand of E-hunting store and does not belong to any other store.