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 Buna N, Durometer (Hardness) Rating Very Hard, Nominal Inside Dia. 13/16 in, Nominal Width 3/16 in, Actual Inside Dia. 0.787 in, Actual Width 0.21 in, Dash Number 315, Color Black, Durometer 90A, Meets/Exceeds ASTM D2000, NBR 90, Nominal Outside Dia. 1 3/16 in, Actual Outside Dia. 1.207 in, FDA Approved Not FDA Approved, Application Standard