170X2 Oring 170mm ID X 2mm CS NBR Nitrile Acrylonitrile Butadiene ShA 70 Black O-ring Oring Sealing O ring Rubber - AliExpress Automobiles & Motorcycles
Select OD from 105mm to 170mm 2mm Section KFM O-Ring gaskets [M_4] | eBay
170X2 Oring 170mm ID X 2mm CS VMQ Silicone O ring O ring Sealing Rubber|Seals| - AliExpress
uxcell Nitrile Rubber O-Rings 30mm OD 27mm ID 1.5mm Width, Metric Buna-N Sealing Gasket, Pack of 10: Amazon.com: Industrial & Scientific