Preciosa Crystal 4mm Bicone, Crystal AB. Beads are about 4.2mm in diameter and about 3.6mm on the drilled dimension, hole size is approximately 0.9mm. Also called a 69 302 Bead Rondel. Sold in packages of 48 beads.
Beadalon 49 is the softest and most flexible of all Beadalon varieties. The clear nylon coating provides good abrasion resistance and prevents kinking.