The ring plug is a tool for firing your silver clay rings. The ring plug ensures that your ring does not shrink beyond the size of the plug, so that a ring that is too small or a deformed ring is a thing of the past.
Download the manual here:
The ring is fired with the ring plug.
The ring can't shrink any further.
You stop the cooled ring with ring plug
in a bowl of water to dissolve the stopper
The ring is the right size and perfectly round.