O-Ring, Metal Detectable Metal Detectable, Not X-Ray Detectable X-Ray Detectable, System of Measurement Metric, Cross Section Shape X, O-Ring Material Buna N, Durometer (Hardness) Rating Medium Hard, Nominal Inside Dia. 55 mm, Nominal Width 2 mm, Actual Inside Dia. 55 mm, Actual Width 2 mm, Dash Number Not Applicable, Color Black, Durometer 70A, Nominal Outside Dia. 59 mm, Actual Outside Dia. 59 mm, Temp. Range -40 Degrees to 250 Degrees F, FDA Approved FDA Approved