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uxcell Nitrile Rubber O-Rings 47mm OD 40mm ID 3.5mm Width, Metric Nitrile Rubber Sealing Gasket for Automotive Machine Plumbing, Pack of 5: Amazon.com: Industrial & Scientific
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32mm ID x 40mm OD x 4mm CS Nitrile Butadiene Rubber O-Ring 20 Pcs – Gavantools
50Pcs 40mm x 1.9mm Rubber O-rings NBR Heat Resistant Sealing Ring Grommets Black - Walmart.com
