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 3/4 in Nominal Width 1/16 in Actual Inside Dia 2.739 in Actual Width 0.07 in Dash Number 039 Color Red Durometer 70 Shore A Meets/Exceeds ASTM D2000 FDA Approved SAE J200 Nominal Outside Dia 2 7/8 in Actual Outside Dia 2.879 in Temp Range -65 Degrees to +400 Degrees F FDA Approved Yes