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 3/4 in Nominal Width 1/8 in Actual Inside Dia 0.734 in Actual Width 0.139 in Dash Number 210 Color Clear with Black Core Durometer 90 Shore A Meets/Exceeds ASTM D2116 Nominal Outside Dia 1 in Actual Outside Dia 1.012 in Temp Range -15 Degrees to 400 Degrees F FDA Approved Yes