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 11/17 in Actual Inside Dia 0.644 in Actual Width 0.087 in Dash Number 908 Color Red Durometer 70 Shore A Meets/Exceeds ASTM D2000 FDA Approved SAE J200 Nominal Outside Dia 1/2 in Actual Outside Dia 0.818 in Temp Range -65 Degrees to 450 Degrees F FDA Approved Yes Package Quantity 50