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

Fits perfectly and feels well made

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 ;)

There isnt much to say about these... They do what they are supposed to. Excellent fit. Something I never knew I needed.

plugged holes as expected

Nice and handy little plugs; fit snugly but also easy to remove. A little on pricey side for just a little piece of rubber, but do the trick.

Used on a switch which is mounted near our ceiling. These keep the dust out of the ports nicely.

Used to seal connectors on an industrial computer

Fits perfectly on both my tplink and treadnet switch

Capped off wall plugs to keep dust out. Fits great

These are exactly what they say they are. Fits perfectly in rj45 sockets