Persian Disc Backing Brass Stamping

What's a backing???  Often times I make a pendant that is awesome, yet the back of it is lacking which makes the pendant look unfinished.  So  I have begun to purchase pieces that are relatively inexpensive that can be glued to the back for a finished look.  I always use E6000 glue.  This is one of those pieces.  It comes in two sizes.  This listing is for the larger size that measures 40mm round.  I call this Persian Disc because the 8 pointed star has been used in architecture in the Middle East for centuries.