These J-Cup protectors are designed to protect the finish and knurling on your barbells from the metal-on-metal contact on the front lip of your J-Cups.
Sold as a pair.
If you would like a color that is not on the list, contact me directly or put a note in the comments and I'll let you know if I can make that happen.
To install, just slip the cover over the front. You can optionally tack it in place with a light adhesive like hot glue.