O-Ring No Metal Detectable No X-Ray Detectable System of Measurement Metric Cross Section Shape Round O-Ring Material HNBR Durometer (Hardness) Rating Medium Hard Nominal Inside Dia 14.8 mm Nominal Width 2.4 mm Actual Inside Dia 14.8 mm Actual Width 2.4 mm Color Green Durometer 70 Shore A Nominal Outside Dia 19.6 mm Actual Outside Dia 19.6 mm Temp Range -55 to 300 Degrees F FDA Approved No Properties Resistant to Chemicals Resistant to Oils Resistant to Water