Tubeaxial Companion Flange, For Fan Diameter 12 in, For Fan Type Tubeaxial, Mounting Hole Diameter 3/8 in, Material Steel, Body Diameter 13 1/2 in, Bolt Circle Diameter 13 3/8 in, For Use With 4C659, 4TM80, Includes Predrilled Mounting Holes, Inside Diameter 12 1/2 in, Outside Diameter 13 1/2 in, Overall Width 1 1/2 in, Product Type Companion Flange, 1 Pair