O-Ring No Metal Detectable No X-Ray Detectable System of Measurement Inch Cross Section Shape Round O-Ring Material Viton Durometer (Hardness) Rating Very Hard Nominal Inside Dia 17 in Nominal Width 1/8 in Actual Inside Dia 16.955 in Actual Width 0.139 in Dash Number 283 Color Black Durometer 90 Shore A Meets/Exceeds ASTM D2000 SAE J200 Nominal Outside Dia 17 1/4 in Actual Outside Dia 17.233 in FDA Approved No