O-Ring, No Metal Detectable, No X-Ray Detectable, System of Measurement Metric, Cross Section Shape Round, O-Ring Material Buna N, Durometer (Hardness) Rating Medium Hard, Nominal Inside Dia. 57 mm, Nominal Width 2 mm, Actual Inside Dia. 57 mm, Actual Width 2 mm, Color Black, Durometer 70 Shore A, Nominal Outside Dia. 61 mm, Actual Outside Dia. 61 mm, Temp. Range -40 Degrees to 250 Degrees F, FDA Approved No, Properties Resistant to Oils, Resistant to Water, Application Standard