O-Ring, No Metal Detectable, No X-Ray Detectable, System of Measurement Inch, Cross Section Shape Round, O-Ring Material Buna N, Durometer (Hardness) Rating Medium Hard, Nominal Inside Dia. 5/8 in, Nominal Width 1/16 in, Actual Inside Dia. 0.6 in, Actual Width 0.07 in, Dash Number 016, Color Black, Durometer 50 Shore A, Nominal Outside Dia. 3/4 in, Actual Outside Dia. 0.754 in, Temp. Range -40 Degrees to 250 Degrees F, FDA Approved No, Properties Resistant to Oils, Resistant to Water