These are solid Metal. They are old molds. They are hard to find nowadays, these are folded perfectly, into a Form Oval with an edge opened. These can be used to finish off an end of wire for example and soldered on. These are very fine and tiny.
8.6mm Round x 6.6mm wide x 2.8 tall or deep.
D-002, Type of Metal - Copper, Brass, Bronze Grade of Metal - First Grade Gauge of Metal - 28 Gauge Measurement - 8.6mm long x 6.6mm wide x 2.8mm tall Quantity - 8