O-Ring, No Metal Detectable, No X-Ray Detectable, System of Measurement Inch, Cross Section Shape Round, O-Ring Material Viton, Durometer (Hardness) Rating Very Hard, Nominal Inside Dia. 9 in, Nominal Width 3/16 in, Actual Inside Dia. 8.975 in, Actual Width 0.21 in, Dash Number 373, Color Black, Durometer 90 Shore A, Meets/Exceeds ASTM D2000, FKM 90, Nominal Outside Dia. 9 3/8 in, Actual Outside Dia. 9.395 in, FDA Approved No, Package Quantity 2