226 Nitrile O-Ring, 70A Durometer, Black (Pack of 25) , Nominal Dimensions: 2" ID, 2-1/4" OD, 1/8" CS Actual Dimensions: 1.984" ID, 2.262" OD, 0.139" CS , Metric Dimensions: 50.39 mm ID, 57.45 mm OD, 3.53 mm CS Temperature Range: -35°C (-31°F) to 120°C (248°F); Shelf-life: 15 Years These versatile o-rings perform well in petroleum based oils & fuels, aliphatic hydrocarbons, vegetable oils, silicone oils & greases, ethylene glycol, dilute acids, and water to below 100°C (212°F) Designed for use in a wide variety of sealing applications, this Nitrile o-ring meets size standards defined by AS568