O-Ring No Metal Detectable No X-Ray Detectable System of Measurement Inch Cross Section Shape Round O-Ring Material PTFE Durometer (Hardness) Rating Very Hard Nominal Inside Dia 3/4 in Nominal Width 1/16 in Actual Inside Dia 0.739 in Actual Width 0.07 in Dash Number 018 Color White Durometer 55 Shore D Nominal Outside Dia 7/8 in Actual Outside Dia 0.879 in Temp Range -300 Degrees to 500 Degrees F FDA Approved Yes Package Quantity 25