O-Ring No Metal Detectable No X-Ray Detectable System of Measurement Inch Cross Section Shape Round O-Ring Material EPDM Durometer (Hardness) Rating Medium Hard Nominal Inside Dia 4 in Nominal Width 3/32 in Actual Inside Dia 3.987 in Actual Width 0.103 in Dash Number 155 Color Black Durometer 70 Shore A Meets/Exceeds ASTM D2000 SAE J200 Nominal Outside Dia 4 3/16 in Actual Outside Dia 4.193 in Temp Range -65 Degrees to 300 Degrees F FDA Approved No Package Quantity 10