Silver Pendant Setting for 18mm Cab

A silver coloured nickel and lead free pendant setting for an 18mm cabochon.

The setting measures approx 20mm and is 3mm deep (not including the bail). The cab sits on a rim so does not go back fully in the setting. These are not suitable for resin pouring as there is a hole in the back and also another at the bottom of the setting (I've tried to show this in the photo).