Amazon.com: uxcell Nitrile Rubber O-Rings 170mm OD 163.8mm ID 3.1mm Width, Metric Sealing Gasket, Pack of 5 : Industrial & Scientific
170X2 Oring 170mm ID X 2mm CS NBR Nitrile Acrylonitrile Butadiene ShA 70 Black O-ring Oring Sealing O ring Rubber - AliExpress Automobiles & Motorcycles
Amazon.com: uxcell Nitrile Rubber O-Rings 170mm OD 163mm ID 3.5mm Width, Metric Nitrile Rubber Sealing Gasket, Pack of 1 : Industrial & Scientific
166mm ID x 170mm OD x 2mm CS Fluoro Rubber O-Ring 2 Pcs – Gavantools