These are jewelry findings crimp beads for jewelry making.
We sell 2000pcs per box, including 2mm/2.5mm/3mm each size 500pcs, 3.5mm 300pcs, 4mm 200pcs.
Size and hole: 2mm=1.2mm hole, 2.5mm=1.5mm hole, 3mm=2mm hole, 3.5mm=2.2mm hole, 4mm=2.5mm hole.