17mm x 22mm x 2.5mm O-Ring (8 pieces): Amazon.com: Industrial & Scientific
Amazon.co.jp: Othmro 0.2 inch (5 mm) Width 0.7 inch (17 mm) Inner Diameter 1.1 inch (27 mm) Outer Diameter 10 Pieces O-Ring Black Nitrile Rubber Ring Skeleton Oil Seal Ring Nitrile Rubber