Amazon.com: 50pcs Adabele Authentic Sterling Silver Open Jump Rings 4mm (0.16 inch) Small O Ring Connector (Thin Wire 0.5mm/24 Gauge/0.02 Inch) for Jewelry Craft Making SS74-4
DANCO Small O-Ring Assortment (35-Piece) 10823 - The Home Depot
Thin O-Ring Gasket Assortment for Water Resistant Watches