O-Ring, No Metal Detectable, No X-Ray Detectable, System of Measurement Inch, Cross Section Shape Round, O-Ring Material EPDM, Durometer (Hardness) Rating Medium Hard, Nominal Inside Dia. 20 in, Nominal Width 1/4 in, Actual Inside Dia. 19.955 in, Actual Width 0.275 in, Dash Number 469, Color Black, Durometer 70 Shore A, Meets/Exceeds ASTM D2000, SAE J200, Nominal Outside Dia. 20 1/2 in, Actual Outside Dia. 20.505 in, Temp. Range -65 Degrees to 300 Degrees F, FDA Approved No