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 9 mm Nominal Width 1.5 mm Actual Inside Dia 9 mm Actual Width 1.5 mm Color Black Durometer 75 Shore A Meets/Exceeds ASTM D2000 SAE J200 Nominal Outside Dia 12 mm Actual Outside Dia 12 mm Temp Range -15 Degrees to 400 Degrees F FDA Approved No Package Quantity 25