O-Ring, No Metal Detectable, No X-Ray Detectable, System of Measurement Inch, Cross Section Shape Round, O-Ring Material Buna N, Durometer (Hardness) Rating Medium Hard, Nominal Inside Dia. 5/8 in, Nominal Width 3/16 in, Actual Inside Dia. 0.6 in, Actual Width 0.21 in, Dash Number 312, Color Black, Durometer 70 Shore A, Meets/Exceeds ASTM D2000, SAE J200, Nominal Outside Dia. 1 in, Actual Outside Dia. 1.02 in, Temp. Range -40 Degrees to 250 Degrees F, FDA Approved No, Package Quantity 50