10Pcs 0.1-0.5mm Brass Misting Nozzles for Cooling System Humidification Sprayer (#5: Pore diameter: 0.50mm) 5-15 days with tracking. Size: 3/16 "= thread diameter 4.5mm Installation: Internal thread connection Purpose: humidification, dust, cooling, landscaping The series of nozzles no air-assisted, simple system installation; Mist spot are fine, up to 3-7 microns, fully atomized, energy saving, low cost and good effect. Package include: 1x Brass Misting Nozzles