This is an Old/Antique Brass Finish Military Star Design Stamped/Embossed Lightweight Metal Button Shank base.
Sizes:
15mm (5/8"-24/L)
20mm (3/4"-32/L)
23mm (7/8"-36/L)
25mm (1"-40/L)
*WE GLADLY COMBINE SHIPPING! Any Postage savings will be
automatically refunded.