7 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..5 mm, Color Black, Durometer 70 Shore A, Meets/Exceeds ASTM D2000, SAE J200, Nominal Outside Dia.5 mm, Actual Inside Dia.