O-ring Nitrile Rubber Black 18mm Inner Diameter 20mm Outer Diameter 1mm

O-Ring Nitrile Rubber

[Size] - Outer Diameter 20mm, Inner Diameter 18mm, Cross-section Diameter 1mm. 18mm x 20mm x 1mm
[Nitrile Rubber] - Made of nitrile rubber (NBR) with excellent oil resistance, abrasion resistance, and heat resistance. Heat resistance temperature: -34°C (-30°F) to 120°C (250°F). It also resists oil, gas, water, and most silicone fluids and solvents.
[Hardness] - 70A Durometer (Shore hardness) for resistance to penetration. The cross-section is round to provide a seal between cylindrical overlapping surfaces.
[Applications] - Widely used for connecting rods, pistons, cushions, valve seals, piston seals, etc. It can also be used for various other applications such as motorcycles, construction machinery, piping, motorcycle accessories, cylinders, hydraulic presses, oil pumps, bearings, industrial machinery, etc. In addition to shaft seals (packings), it can be used as a gasket by placing it in a groove. It is very useful as a sealing tool to prevent leaks!
[Notes] - *This is a general-purpose product. Please confirm the required size and material before purchasing and place it in the appropriate location. *Cannot be used in areas where gasoline comes into contact, such as carburetors. *Cannot be used for air conditioning piping.

I intended to use it after purchase, but
the size didn't fit, so I have no opportunity to use it.
I am listing it for sale.
I tried to fit one of them to use, but the rest are unused.
The package says 10Pcs, but
upon checking, there were 12 pieces included.
The package has been opened, so
I will seal it with cellophane tape.
Please refrain from purchasing if you are sensitive about this.

Thank you for looking.