O-Ring, No Metal Detectable, No X-Ray Detectable, System of Measurement Inch, Cross Section Shape Round, O-Ring Material HNBR, Durometer (Hardness) Rating Medium Hard, Nominal Inside Dia. 7 1/2 in, Nominal Width 3/16 in, Actual Inside Dia. 7.4 in, Actual Width 0.21 in, Dash Number 367, Color Black, Durometer 80 Shore A, Nominal Outside Dia. 7 7/8 in, Actual Outside Dia. 7.895 in, Temp. Range -55 to 300 Degrees F, FDA Approved No