O-Ring, No Metal Detectable, No X-Ray Detectable, System of Measurement Metric, Cross Section Shape Round, O-Ring Material Silicone, Durometer (Hardness) Rating Medium Hard, Nominal Inside Dia. 54 mm, Nominal Width 3 mm, Actual Inside Dia. 54 mm, Actual Width 3 mm, Color Red, Durometer 70 Shore A, Meets/Exceeds FDA, Nominal Outside Dia. 60 mm, Actual Outside Dia. 60 mm, Temp. Range -80 Degrees to 450 Degrees F, FDA Approved Yes