This is a very unique Cast Metal 1960's liquid/lava pattern Button Antique Silver Finish shank base.
Sizes:
11/mm (7/16" or 18/L)
22mm (7/8" or 36/L)
25mm (1" or 40/L)
32mm (1-1/4' or 50/L)
*WE GLADLY COMBINE SHIPPING! Any Postage savings will be
automatically refunded