Component Identification

I have seen these before but do not know what it is. Found nothing on Google. I think it is part of the irrigation system.

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Looks like a home grown mister… mist nozzles mounted into a PVC cap…

Misting Nozzles - Patio Misting Systems, Mist Fans, Fog Systems: Aero Mist Outdoor Mist Systems, Outdoor Misting Kit

Misting nozzle. They clog easily.

Thanks.