uxcell Nitrile Rubber O-Rings, 6mm OD 3mm ID 1.5mm Width, Metric Sealing Gasket, Pack of 20: Amazon.com: Industrial & Scientific
Nitrile (NBR) 70 ID x CS mm Metric sizes ORing CS =1 mm O Ring Seals Buna N 70 Rubber gasket|rubber gasket|o-ring sealrubber sealing gasket - AliExpress
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NBR O Ring Seal Gasket CS 4mm OD 12mm-450mm Nitrile Rubber Spacer Oil Resistance | eBay
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Nitrile (nbr) 70 Metric Mm Id X Cs Mm O-ring Cs =3.1 Mm Metric Sizes Oring Seals Buna N 70 Rubber Gasket - Gaskets - AliExpress
China Silicone NBR O Ring Seals Rubber O Ring with High Strength Manufacturer and Supplier | Zichen
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Othmro 50pcs Nitrile Rubber O-Rings, 3mm Wire Dia 12mm OD Metric Sealing Nitrile NBR Rubber Washers for Oil or Air Sealing, Professional Plumbing, Car Repair, Air or Gas Connections Black: Amazon.com: Industrial