O-Ring No Metal Detectable No X-Ray Detectable System of Measurement Inch Cross Section Shape Round O-Ring Material FEP with Viton Core Durometer (Hardness) Rating Very Hard Nominal Inside Dia 9/16 in Nominal Width 3/32 in Actual Inside Dia 0.549 in Actual Width 0.103 in Dash Number 113 Color Clear with Black Core Durometer 90 Shore A Meets/Exceeds ASTM D2116 Nominal Outside Dia 3/4 in Actual Outside Dia 0.755 in Temp Range -15 Degrees to 400 Degrees F FDA Approved Yes