O-Ring, No Metal Detectable, No X-Ray Detectable, System of Measurement Inch, Cross Section Shape Round, O-Ring Material Silicone, Durometer (Hardness) Rating Medium Hard, Nominal Inside Dia. 2-1/8 In., Nominal Width 3/16 In., Actual Inside Dia. 2.1 In., Actual Width 0.210 In., Dash Number 330, Color Red, Durometer 70 Shore A, Meets/Exceeds ASTM D2000 -VQM 70, FDA 21 CFR 177.2600, Nominal Outside Dia. 2-1/2 In., Actual Outside Dia. 2.520 In., Temp. Range -65 Degrees to +400 Degrees F