O-Ring,9.,PK50 Range -15 Degrees to 100 Degrees F, FDA Approved No, Package Quantity 50 9.2 mm, Actual Width 1. O-Ring, No Metal Detectable, No X-Ray Detectable, System of Measurement Metric, Cross Section Shape Round, O-Ring Material Nitrile, Durometer (Hardness) Rating Medium Hard, Nominal Inside Dia.