I bought 2 packs of these for my road case, just in case I needed them. I'm glad they are available because I've already lost one of my shells on a gig when I needed to take it off to use in a standard RJ45 jack.

I was unable to keep my 20ft Cat6 cable connected to my mixer due to the removable shell becoming loose and getting lost. I contacted GLS and was guided to this replacement pack. 4 replacement shells and gaskets come with the pack which means if I lose another cable end, I will have 3 replacements at the ready. Thank goodness, these are sold as replacements. If you are looking at this review, you probably already have lost one of the shells from your cable but if you haven't yet - a word of warning, if the shell comes off, make sure to look for the little rubber gasket - otherwise the shell won't stay on anymore.

Unfortunately I crushed a couple of my ends for my GLS ethercon cables. Luckily they sell these replacements. They are exactly like the ones on my cables, and work perfectly.