Help Identifying Ring Closure

[zofia81]

Hi,

I really want to buy some of these closures used on the back of either of these rings (pictured).
I have no idea what they are called so am hoping someone here can help tell me!

Thanks!

[Dennis]

They could be exclusive to the ring company.

[CJ57]

It looks like a piece of tubing squished ( not a technical,term) in the middle like the fittings you get for the end of cords. Wouldn’t have thought it was a comfortable fit for a ring

[zofia81]

One looks like a hollow tube with 2 spikes that clamp down. That's more the type I am looking for. Just baffled as to the name of it!

[CJ57]

It’s the sort of connector you’d see for cord or suchlike and the marks will be made by the pliers for that job. Not anything that anyone here would choose for joining silver as soldering would be preferable . Sorry but I don’t know of anything like it otherwise