X-Ray and Metal Detectable O-Ring Yes Metal Detectable Yes X-Ray Detectable System of Measurement Inch Cross Section Shape Round O-Ring Material Buna N Durometer (Hardness) Rating Medium Hard Nominal Inside Dia 7/16 in Nominal Width 1/16 in Actual Inside Dia 0.549 in Actual Width 0.103 in Dash Number 113 Color Blue Durometer 70 Shore A Meets/Exceeds FDA Nominal Outside Dia 9/16 in Actual Outside Dia 0.755 in Temp Range -30 Degrees to 250 Degrees F FDA Approved Yes