O-Ring No Metal Detectable No X-Ray Detectable System of Measurement Inch Cross Section Shape Round O-Ring Material HNBR Durometer (Hardness) Rating Medium Hard Nominal Inside Dia 1 5/16 in Nominal Width 1/8 in Actual Inside Dia 1.2 in Actual Width 0.139 in Dash Number 219 Color Black Durometer 80 Shore A Nominal Outside Dia 1 9/16 in Actual Outside Dia 1.574 in Temp Range -55 to 300 Degrees F FDA Approved No