O-Ring No Metal Detectable No X-Ray Detectable System of Measurement Inch Cross Section Shape Round O-Ring Material Buna N Durometer (Hardness) Rating Medium Hard Nominal Inside Dia 3/4 in Nominal Width 3/32 in Actual Inside Dia 0.737 in Actual Width 0.103 in Dash Number 116 Color Black Durometer 70 Shore A Meets/Exceeds 21CFR177.2600 ASTM D2000 NSF Standard 61 SAE J200 Nominal Outside Dia 15/16 in Actual Outside Dia 0.943 in Temp Range -40 Degrees to 250 Degrees F