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 1/2 in Nominal Width 1/8 in Actual Inside Dia 0.484 in Actual Width 0.139 in Dash Number 206 Color Black Durometer 70 Shore A Meets/Exceeds ASTM D2000 SAE J200 Nominal Outside Dia 3/4 in Actual Outside Dia 0.762 in Temp Range -40 Degrees to 180 Degrees F FDA Approved No