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 15/16 in Nominal Width 1/16 in Actual Inside Dia 0.9 in Actual Width 0.07 in Dash Number 021 Color Black Durometer 75 Shore A Meets/Exceeds 3A 18-03 FDA USP Class VI Nominal Outside Dia 1 1/16 in Actual Outside Dia 1.066 in Temp Range 30 Degrees to 520 Degrees F FDA Approved Yes