uxcell 316 Stainless Steel Round Ring Welded O-Rings 30mm(1.18") ID 6mm Thick 3pcs - - Amazon.com
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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
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uxcell Nitrile Rubber O-Rings, 36mm OD 30mm ID 3mm Width, Metric Sealing Gasket, Pack of 10: Amazon.com: Industrial & Scientific
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uxcell Nitrile Rubber O-Rings 33mm OD 30mm ID 1.5mm Width, Metric Sealing Gasket, Pack of 10: Amazon.com: Industrial & Scientific