O-Ring No Metal Detectable No X-Ray Detectable System of Measurement Inch Cross Section Shape Round O-Ring Material Kalrez 6230 Durometer (Hardness) Rating Medium Hard Nominal Inside Dia 1/8 in Nominal Width 3/32 in Actual Inside Dia 0.1 in Actual Width 0.103 in Dash Number 104 Color Black Durometer 75 Shore A Meets/Exceeds 3A 18-03 FDA USP Class VI Nominal Outside Dia 5/16 in Actual Outside Dia 0.318 in Temp Range 30 Degrees to 520 Degrees F FDA Approved Yes