O-Ring No Metal Detectable No X-Ray Detectable System of Measurement Inch Cross Section Shape X O-Ring Material Buna N Durometer (Hardness) Rating Medium Hard Nominal Inside Dia 5/16 in Nominal Width 1/16 in Actual Inside Dia 0.301 in Actual Width 0.07 in Dash Number 011 Color Black Durometer 70 Shore A Meets/Exceeds ASTM D2000 SAE J200 Nominal Outside Dia 7/16 in Actual Outside Dia 0.441 in Temp Range -40 Degrees to 250 Degrees F FDA Approved Yes Package Quantity 100