Zerone UHF Coaxial Lightning Surge Arrester Lightning Surge Protector Male to Female UHF Connector

Everything about the product (labeling, packaging, instruction sheet, decal) indicates its Japanese origins, but then it's delivered in a baggie clearly marked 'Made in China'. With that out of the way, it appears to be up to the expected quality; looks fine. I'm not in a position to test the trigger voltage of the embedded gas tube, but perhaps later I'll see if I can sweep it with a VNA to confirm impedance and loss (I'm not expecting any issues). I'll likely use a $100+ Polyphaser for the final stage of protection at the shack entrance; these cheaper ones will be outdoors (in a protective enclosure), closer to the antenna base as the first line of defense. 73.

Arrived today - fast shipping. I was not expecting to get a Diamond branded item! Matches up to one I bought from Diamond, and paid more money for. Very happy. I took a couple of photos that did not turn out well - however it gives you an idea of what to expect in the Mail.

It's Diamond branded in a sealed Diamond bag, just like the ones I paid 10.00 more for at the radio store. Can't say how well it works.....have not been close to a lightning strike yet, hope I never find out. Have had these on all of my antennas for many years.

First: this is a Diamond branded arrestor. Good news. According to the enclosed spec sheet, it is not waterproof and should be taped. Since I have it mounted directly to the balun on my inverted v, it is exposed to the weather. Other than that, no complaints.

I purchased this because it was half the price of other lightning arrestors. I figured it looked the same so it is probably "good enough". When it arrived, it was a Diamond product in a Diamond bag. It seems to be well made (for a very simple product) and I can't find any flaws to make me think it isn't genuine.