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 15 mm Nominal Width 1 mm Actual Inside Dia 15 mm Actual Width 1 mm Color Black Durometer 75 Shore A Nominal Outside Dia 17 mm Actual Outside Dia 17 mm Temp Range -15 Degrees to 400 Degrees F FDA Approved No