O-Ring No Metal Detectable No X-Ray Detectable System of Measurement Inch Cross Section Shape Round O-Ring Material FEP with Silicone Core Durometer (Hardness) Rating 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 Clear with Red Core Durometer 85 Shore A Meets/Exceeds ASTM D2116 Nominal Outside Dia 1 9/16 in Actual Outside Dia 1.574 in Temp Range -75 Degrees to 400 Degrees F FDA Approved Yes