O-Ring No Metal Detectable No X-Ray Detectable System of Measurement Inch Cross Section Shape Round O-Ring Material EPDM Durometer (Hardness) Rating Medium Hard Actual Inside Dia 0.301 in Actual Width 0.064 in Dash Number 903 Color Black Durometer 70 Shore A Meets/Exceeds ASTM D2000 SAE J200 Nominal Outside Dia 3/16 in Actual Outside Dia 0.429 in Temp Range -65 Degrees to 300 Degrees F FDA Approved No Package Quantity 90