Solid Copper
25 Closed Jump Rings, 4mm, 18 Gauge.
- These gleaming 4mm jump rings are a great all-purpose size. Our wire gauge puts them at 21 gauge, or .028 Inch thick.
- Closed jump rings are great as the female half of a delicate clasp.
- Quantity: 25 4 outside diameter 21 Gauge Closed jump rings.