O-Ring No Metal Detectable No X-Ray Detectable System of Measurement Metric Cross Section Shape Round O-Ring Material Nitrile Durometer (Hardness) Rating Medium Hard Nominal Inside Dia 4.5 mm Nominal Width 1.5 mm Actual Inside Dia 4.5 mm Actual Width 1.5 mm Color Green Durometer 70 Shore A Meets/Exceeds ASTM D2000 SAE J200 Nominal Outside Dia 7.5 mm Actual Outside Dia 7.5 mm Temp Range -15 Degrees to 100 Degrees F FDA Approved No Package Quantity 50