O-Ring No Metal Detectable No X-Ray Detectable System of Measurement Inch Cross Section Shape Round O-Ring Material Buna N Durometer (Hardness) Rating Medium Hard Nominal Inside Dia 8 1/2 in Nominal Width 1/8 in Actual Inside Dia 8.484 in Actual Width 0.139 in Dash Number 268 Color Black Durometer 70 Shore A Meets/Exceeds ASTM D2000 SAE J200 Nominal Outside Dia 8 3/4 in Actual Outside Dia 8.762 in Temp Range -40 Degrees to 250 Degrees F FDA Approved No Package Quantity 5