O-Ring No Metal Detectable No X-Ray Detectable System of Measurement Metric Cross Section Shape Round O-Ring Material Buna N Durometer (Hardness) Rating Medium Hard Nominal Inside Dia 63 mm Nominal Width 5 mm Actual Inside Dia 63 mm Actual Width 5 mm Color Black Durometer 70 Shore A Nominal Outside Dia 73 mm Actual Outside Dia 73 mm Temp Range -40 Degrees to 250 Degrees F FDA Approved No Properties Resistant to Oils Resistant to Water Application Standard