iExcell 25 Pcs Black Ethernet Hub Port RJ45 Anti Dust Cover Cap Protector Plug

Fits perfectly and feels well made

I liked them, but depending on the design of your device, it might fit or it might not. For example, on my mac Mini it doesnt fit well, so part of it ends up sticking out. But it does fit precisely on other devices like my Raspberry Pi 2 and 3B+.

Seals the connection tight and holds in place very well.

As advertised.

Fit is reasonable for standard ethernet port. There is no indication in the listing about country of manufacture. The packing states, Made in China.

Fits perfectly on both my tplink and treadnet switch

They fit snugly in the Ethernet opening and dont fall out.

Only 4 stars as I havent had time to run these through their paces, but they seem like they will fit the bill. My priority of use was to plug up an empty microphone port on the back of an HF radio (mic is plugged into the remote head port not the radio itself). It seems like the dust bunnys always attack the back of your equipment, shyness I suppose ;) The first one I installed is a little ornery getting inserted, but once in, seems tight and flush with the surrounding port which is a good thing. Id say these are perfect for protecting the ports you seldom; maybe never use. If you need something you will be accessing often, I would thing these would eventually loose their stopper ability if constantly inserted and removed. Great for Amateur radio operators with all the RJ45 jacks on everything these days. Would definitely recommend for anyone wanting to protect said jacks on their pack-able radios at least. Now to plug up all the unused ethernet ports on my PCs ;)

Stays in place and easy to remove if needed on my Lenovo e11 Yoga. For whatever reason, Lenovo decided to place their rectangular, power connector, Ethernet port and a USB port side-by-side. If yourre not paying attention its very easy to jam the power connector or a USB device into that Ethernet port. This solved my problem and looks alright.

These have a snug fit to stop dust getting in to unused ports but are still easy to remove. 50 in a bag is great value for $9.99.