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 23 in Nominal Width 1/4 in Actual Inside Dia 22.94 in Actual Width 0.275 in Dash Number 472 Color Red Durometer 70 Shore A Meets/Exceeds ASTM D2000 FDA Approved SAE J200 Nominal Outside Dia 23 1/2 in Actual Outside Dia 23.49 in Temp Range -65 Degrees to +400 Degrees F FDA Approved Yes