Rugged and Reliable: Brass housing and brass valve stem, corrosion resistant, resistant to high temperature and impact, 1-1/2" cast brass adjustable atomizing nozzle. Exact Size: The 1-1/2" NST/NH nozzle has an IDM of 1.86", female side can only be connected to the male 1-1/2" NH/NST. 2 Pack. Easy Control: Turn to control on and off and adjust the spray size, from DC to mist for multi-purpose. 100 psi maximum pressure (water only). Wide Application: Essential nozzle for exposed and theft-prone fire hose rack units, connected to a fire hose and used to extinguish fires, can also be used in greenhouse applications, dust suppression and evaporative cooling. Constant Flow: Ability to close completely, direct current or any degree of cone fog, provides consistent volume at any spray angle. QWORK