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 1/2 in Nominal Width 3/32 in Actual Inside Dia 0.487 in Actual Width 0.103 in Dash Number 112 Color Black Durometer 70 Shore A Meets/Exceeds 21CFR177.2600 ASTM D2000 NSF Standard 61 SAE J200 Nominal Outside Dia 11/16 in Actual Outside Dia 0.693 in Temp Range -65 Degrees to 300 Degrees F