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. 22 mm, Nominal Width 3.5 mm, Actual Inside Dia. 22 mm, Actual Width 3.5 mm, Color Red, Durometer 70 Shore A, Meets/Exceeds FDA, Nominal Outside Dia. 29 mm, Actual Outside Dia. 29 mm, Temp. Range -80 Degrees to 450 Degrees F, FDA Approved Yes