O-Ring No Metal Detectable No X-Ray Detectable System of Measurement Inch Cross Section Shape Round O-Ring Material Viton Durometer (Hardness) Rating Very Hard Nominal Inside Dia 5 1/8 in Nominal Width 1/8 in Actual Inside Dia 1.355 in Actual Width 0.116 in Dash Number 918 Color Black Durometer 90 Shore A Meets/Exceeds ASTM D2000 SAE J200 Nominal Outside Dia 5 3/8 in Actual Outside Dia 1.587 in Temp Range -15 Degrees to 400 Degrees F FDA Approved No Package Quantity 25