O-Ring No Metal Detectable No X-Ray Detectable System of Measurement Inch Cross Section Shape Rectangular O-Ring Material PTFE Durometer (Hardness) Rating Very Hard Nominal Inside Dia 2 1/8 in Nominal Width 1/16 in Actual Inside Dia 2.138 in Actual Width 0.183 in Color White Durometer 55 Shore D Nominal Outside Dia 5/16 in Actual Outside Dia 2.504 in Temp Range -100 Degrees to 500 Degrees F FDA Approved Yes Package Quantity 10