O-Ring, No Metal Detectable, No X-Ray Detectable, System of Measurement Metric, Cross Section Shape Round, O-Ring Material Viton, Durometer (Hardness) Rating Medium Hard, Nominal Inside Dia. 150 mm, Nominal Width 2.5 mm, Actual Inside Dia. 150 mm, Actual Width 2.5 mm, Color Black, Durometer 75 Shore A, Nominal Outside Dia. 155 mm, Actual Outside Dia. 155 mm, Temp. Range -15 Degrees to 400 Degrees F, FDA Approved No