This is a 5 Kyber Crystal Holder for your belt or saber holder strap. It is made of heavy nylon bag fabric. It has a plexiglass inside for strength. Also a medium weight elastic to hold in place and to offer easy removal and replacement. The belt holder is a standard bag / belt slide strap.
Basically I needed one for myself so I made the 5 crystal holder. I had many comments and requests so I decided to produce them.
All are hand made by me of my wife. I have sold over a hundred with no issues. Mine is over 2 years old. Elastic is still great.
I also have a 6 kyber holder if you are like me and ended up buying a green or red one just for the case after I collected the other 5 colors.