O-Ring No Metal Detectable No X-Ray Detectable System of Measurement Inch Cross Section Shape X O-Ring Material Buna N Durometer (Hardness) Rating Medium Hard Nominal Inside Dia 1 1/2 in Nominal Width 3/32 in Actual Inside Dia 1.487 in Actual Width 0.103 in Dash Number 128 Color Black Durometer 70 Shore A Meets/Exceeds ASTM D2000 SAE J200 Nominal Outside Dia 1 11/16 in Actual Outside Dia 1.693 in Temp Range -40 Degrees to 250 Degrees F FDA Approved Yes