16mm x 4mm (24mm OD) Nitrile O-Rings – Totally Seals
White | Rings | Plastic | Hudson Supplies Inc.
16mm Silver Fancy Round Open Ring – beadsnfashion
14G Long Belly Ring 12/14/16mm Navel Piercing Jewelry Reverse Belly Button Rings | eBay
Fine-Thornton Fixation Ring 16mm
14g Seamless Ring 12mm 13mm 14mm 15mm 16mm Nose Ring - Etsy
ENERGIZING HEMATITE CABOCHON RING - 16MM – Emily Rose Gems
Volvo DP-ABC Propeller Nut Locking Ring 853869
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O Ring, 16mm x 3mm, 05 000 568 - Elemental Microanalysis
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Lake Superior Agate Ring 16mm x12mm Bezel Set – Keweenaw Gem and Gift