Round Spacer, Spacer Type Round, For Screw Size #12, Overall Length 1/4 in, Inside Diameter 0.218 in, Outside Diameter 3/8 in, Retaining Rib Diameter Not Applicable, Material Aluminum, Material Grade/Class 2011-T3, Finish Plain, System of Measurement Inch/Metric, Hex Width Not Applicable, Color Silver, Package Quantity 25