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 Nominal Inside Dia 11 in Nominal Width 3/16 in Actual Inside Dia 10.975 in Actual Width 0.21 in Dash Number 379 Color Black Durometer 70 Shore A Meets/Exceeds ASTM D2000 EPDM 70 Nominal Outside Dia 11 3/8 in Actual Outside Dia 11.395 in FDA Approved No Package Quantity 5