Manufacturer Varies O-Ring,Buna N,Black,PK10 GR-N90045/10

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 in, Nominal Width 1/16 in, Actual Inside Dia. 3.989 in, Actual Width 0.07 in, Dash Number 045, Color Black, Durometer 90A, Meets/Exceeds ASTM D2000, NBR 90, Nominal Outside Dia. 4 1/8 in, Actual Outside Dia. 4.129 in, FDA Approved Not FDA Approved, Application Standard