O-Ring, Not Metal Detectable Metal Detectable, Not X-Ray Detectable 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. 3/4 in, Nominal Width 1/16 in, Actual Inside Dia. 0.739 in, Actual Width 0.07 in, Dash Number 018, Color Clear with Red Core, Durometer 85A, Meets/Exceeds ASTM D2116, Nominal Outside Dia. 7/8 in, Actual Outside Dia. 0.879 in