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 1 7/8 in Nominal Width 1/16 in Actual Inside Dia 1.888 in Actual Width 0.183 in Color White Durometer 55 Shore D Nominal Outside Dia 1/4 in Actual Outside Dia 2.254 in Temp Range -100 Degrees to 500 Degrees F FDA Approved Yes Package Quantity 10