PtahTex Diffusers Atomizing Nozzle(4pcs)

This is a specific review of the nozzles used in this Ptahtex diffuser. I have tested 6 of these atomizing nozzles, with 2 working properly, 2 failing outright, and 2 performing at less than 25% of nominal output....Meaning 66% of them failed Quality Assurance standards (I know that sounds awful, but read on).*UPDATE*Coldaroma once again proved their commitment to excellent customer service by sending me replacement nozzles to test. I received a 4-pack, with all four of them performing admirably. This changes my sample size to 10, with 2 total failures, and two partial failures.Conclusion? Take a chance on these. They are legitimately the best way to diffuse essential oils you can currently find, and if you get a bum one, contact Coldaroma and they WILL make it right.