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 4 3/4 in Nominal Width 1/8 in Actual Inside Dia 4.734 in Actual Width 0.139 in Dash Number 248 Color Red Durometer 70 Shore A Meets/Exceeds ASTM D2000 -VQM 70 FDA 21 CFR 177.2600 Nominal Outside Dia 5 in Actual Outside Dia 5.012 in Temp Range -65 Degrees to +400 Degrees F FDA Approved Yes