O-Ring No Metal Detectable No X-Ray Detectable System of Measurement Inch Cross Section Shape Round O-Ring Material Kalrez 4079 Durometer (Hardness) Rating Medium Hard Nominal Inside Dia 1 5/8 in Nominal Width 1/16 in Actual Inside Dia 1.6 in Actual Width 0.07 in Dash Number 030 Color Black Durometer 75 Shore A Nominal Outside Dia 1 3/4 in Actual Outside Dia 1.754 in Temp Range 30 Degrees to 600 Degrees F FDA Approved No