uxcell 304 Stainless Steel Welded O Ring 30mm(1.18") Outer Dia. 3mm Thickness 10pcs - - Amazon.com
Amazon.com: MroMax 6Pcs 1.18" ID x 0.12" Thickness O Ring Buckle Zinc Alloy O-Rings Fasteners 30mm x 3mm for DIY Accessories Purse Straps Backpacks Bags Belts Craft Hardware Black Tone
Amazon.com: 950pcs/set Watch O-Ring Set 0.5/0.6/0.7mm 12mm-30mm Universal Rubber O-Ring Watch Back Cover Seal Gaskets(950pcs-0.5mm) : Clothing, Shoes & Jewelry
Amazon.com: uxcell Nitrile Rubber O-Rings 30mm OD 26mm ID 2mm Width, Metric Buna-N Sealing Gasket, Pack of 50 : Industrial & Scientific
MT MORN0300020-30mm X 34mm 70 Buna O-Ring (10 Pack): Amazon.com: Industrial & Scientific