O-Ring No Metal Detectable No X-Ray Detectable System of Measurement Inch Cross Section Shape Round O-Ring Material Kalrez 4079 Durometer (Hardness) Rating Medium Hard Nominal Inside Dia 7/16 in Nominal Width 3/32 in Actual Inside Dia 0.4 in Actual Width 0.103 in Dash Number 111 Color Black Durometer 75 Shore A Nominal Outside Dia 5/8 in Actual Outside Dia 0.63 in Temp Range 30 Degrees to 600 Degrees F FDA Approved No