O-Ring No Metal Detectable No X-Ray Detectable System of Measurement Metric Cross Section Shape Round O-Ring Material Viton Durometer (Hardness) Rating Medium Hard Nominal Inside Dia 45 mm Nominal Width 2.5 mm Actual Inside Dia 45 mm Actual Width 2.5 mm Color Black Durometer 75 Shore A Nominal Outside Dia 50 mm Actual Outside Dia 50 mm Temp Range -15 Degrees to 400 Degrees F FDA Approved No