After checking the Johnny W website I believe they call those receivers “Aluminum Coping Covers and Liner Receiver”.

I rounded up a couple pictures of bead receivers. The first is the one in question, the second two from different pool stores. I have seen a few versions of these but they are all similar.







I’m pretty sure you can install a beaded liner into that pool. I have been wrong before however. Any other opinions?

Later, Dennis