O-Ring No Metal Detectable No X-Ray Detectable System of Measurement Metric Cross Section Shape Round O-Ring Material EPDM Durometer (Hardness) Rating Medium Hard Nominal Inside Dia 16 mm Nominal Width 1.5 mm Actual Inside Dia 16 mm Actual Width 1.5 mm Color Black Durometer 70 Shore A Nominal Outside Dia 19 mm Actual Outside Dia 19 mm Temp Range -70 Degrees to 300 Degrees F FDA Approved No