O-Ring No Metal Detectable No X-Ray Detectable System of Measurement Inch Cross Section Shape Round O-Ring Material Neoprene Durometer (Hardness) Rating Medium Hard Nominal Inside Dia 2 in Nominal Width 3/16 in Actual Inside Dia 1.975 in Actual Width 0.21 in Dash Number 329 Color Black Durometer 70 Shore A Meets/Exceeds ASTM D2000 SAE J200 Nominal Outside Dia 2 3/8 in Actual Outside Dia 2.395 in Temp Range -40 Degrees to 225 Degrees F FDA Approved No Package Quantity 25