O-Ring, Not 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 Very Hard, Nominal Inside Dia. 4 1/2 in, Nominal Width 1/16 in, Actual Inside Dia. 4.489 in, Actual Width 0.07 in, Dash Number 047, Color Black, Durometer 90A, Meets/Exceeds ASTM D2000, NBR 90, Nominal Outside Dia. 4 5/8 in, Actual Outside Dia. 4.629 in, Not , Application Standard