1.brass fittings for cooling fog nozzles/female socket 2.1/2" female,connect to nozzle 3.OEM accept brass fittings for cooling fog nozzles/female socket one end 1/2" female thread connect to fog spray nozzlethe other end connect to water pipeAperture(mm):Φ10, Φ9.52, Φ8Model: 6006material: brass copperapplication:mist/fog nozzle brass fittings for cooling fog nozzles/female socket