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. 2 11/16 in, Nominal Width 3/32 in, Actual Inside Dia. 2.6 in, Actual Width 0.103 in, Dash Number 147, Color Black, Durometer 80 Shore A, Nominal Outside Dia. 2 7/8 in, Actual Outside Dia. 2.881 in, Temp. Range -55 to 300 Degrees F, FDA Approved No