Sterling Silver Open Jump Rings 18 ga 6mm (20pcs).
PH PandaHall Open Jump Rings 304 Stainless Steel, 1000pcs O Ring Connectors 4mm 5mm 6mm 8mm 9mm 10mm Wire 18-Gauge Close But Unsoldered Chainmail Rings for Earring Bracelet Making Repairing : Amazon.ca:
Stainless Steel Open Jump Rings 18 Gauge 6mm - Etsy New Zealand