O-Ring, Metal Detectable Metal Detectable, Not X-Ray Detectable X-Ray Detectable, System of Measurement Inch, Cross Section Shape Round, O-Ring Material Buna N, Durometer (Hardness) Rating Medium Hard, Nominal Inside Dia.07 in, Dash Number 012, Color Black, Durometer 70A, Nominal Outside Dia.504 in, Temp. Range -40 Degrees to 250 Degrees F, FDA Approved FDA Approved 0.