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 4 1/4 in Nominal Width 3/32 in Actual Inside Dia 4.237 in Actual Width 0.103 in Dash Number 156 Color White Durometer 55 Shore D Nominal Outside Dia 4 7/16 in Actual Outside Dia 4.443 in Temp Range -100 Degrees to 500 Degrees F FDA Approved Yes Package Quantity 5