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 5/16 in Nominal Width 1/8 in Actual Inside Dia 1.296 in Actual Width 0.139 in Dash Number 219 Color Black Durometer 70 Shore A Meets/Exceeds 21CFR177.2600 ASTM D2000 NSF Standard 61 SAE J200 Nominal Outside Dia 1 9/16 in Actual Outside Dia 1.574 in Temp Range -65 Degrees to 300 Degrees F