This is a Titanium ball closure ring (BCR) or captive bead ring. It is available in several sizes as follows:
1.2mm wire is available in 7mm, 8mm and 10mm and has a 4mm ball.
1.6mm wire is available in 8mm and 10mm with a 4mm ball and in 12mm and 14mm with a 5mm ball.
The ball has dimples either side of the ball which is held in place by the tension of the ring.
Suitable for an initial piercing.
Packed in 5’s per size.