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 Very Hard Nominal Inside Dia 5/32 in Nominal Width 3/32 in Actual Inside Dia 0.143 in Actual Width 0.103 in Dash Number 105 Color Black Durometer 90 Shore A Meets/Exceeds ASTM D2000 NBR 90 Nominal Outside Dia 11/32 in Actual Outside Dia 0.349 in FDA Approved No Package Quantity 50