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 3 1/8 in Nominal Width 1/8 in Actual Inside Dia 3.109 in Actual Width 0.139 in Dash Number 235 Color Black Durometer 70 Shore A Meets/Exceeds ASTM D2000 SAE J200 Nominal Outside Dia 3 3/8 in Actual Outside Dia 3.387 in Temp Range -65 Degrees to 300 Degrees F FDA Approved No Package Quantity 25