70 mm, Temp. 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.5mm Wide 67mm ID, PK5 Range -15 Degrees to 400 Degrees F, FDA Approved No 67 mm, Actual Width 1.5 mm, Color Black, Durometer 75 Shore A, Nominal Outside Dia.