O-Ring No Metal Detectable No X-Ray Detectable System of Measurement Inch Cross Section Shape Round O-Ring Material Viton Durometer (Hardness) Rating Medium Hard Nominal Inside Dia 6 1/4 in Nominal Width 3/32 in Actual Inside Dia 6.237 in Actual Width 0.103 in Dash Number 164 Color Black Durometer 75 Shore A Meets/Exceeds ASTM D2000 SAE J200 Nominal Outside Dia 6 7/16 in Actual Outside Dia 6.443 in Temp Range -15 Degrees to 400 Degrees F FDA Approved No