Manufacturer Varies O-Ring,Dash 390,Viton,0.21 In. GR-V75390

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 , Durometer (Hardness) Rating Medium Hard, Nominal Inside Dia. 21 in, Nominal Width 3/16 in, Actual Inside Dia. 20.955 in, Actual Width 0.21 in, Dash Number 390, Color Black, Durometer 75A, Meets/Exceeds ASTM D2000, SAE J200, Nominal Outside Dia. 21 3/8 in, Actual Outside Dia. 21.375 in, Temp. Range -15 Degrees to 400 Degrees F