O-Ring No Metal Detectable No X-Ray Detectable System of Measurement Inch Cross Section Shape Round O-Ring Material Polyurethane Durometer (Hardness) Rating Medium Hard Nominal Inside Dia 2 1/8 in Nominal Width 1/8 in Actual Inside Dia 2.1 in Actual Width 0.139 in Dash Number 227 Color Natural Durometer 70 Shore A Nominal Outside Dia 2 3/8 in Actual Outside Dia 2.387 in Temp Range -20 Degrees to 180 Degrees F FDA Approved No