18 mm, Actual Outside Dia.
O-Ring, No Metal Detectable, No X-Ray Detectable, System of Measurement Metric, Cross Section Shape Round, O-Ring Material Buna N, Durometer (Hardness) Rating Medium Hard, Nominal Inside Dia. Buna-N O-Ring, 5mm Wide 8mm ID, PK25 Range -40 Degrees to 250 Degrees F, FDA Approved No, Properties Resistant to Oils, Resistant to Water, Application Standard 8 mm, Actual Width 5 mm, Color Black, Durometer 70 Shore A, Nominal Outside Dia. 8 mm, Nominal Width 5 mm, Actual Inside Dia..