40 mm, Actual Outside Dia.
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. Silicone O-Ring, 4mm Wide 32mm ID, PK5 Range -80 Degrees to 450 Degrees F, FDA Approved Yes 32 mm, Actual Width 4 mm, Color Red, Durometer 70 Shore A, Meets/Exceeds FDA, Nominal Outside Dia. 32 mm, Nominal Width 4 mm, Actual Inside Dia..