One (1) New Aftermarket Replacement Fan Hub Assembly with Pulley forFits Fits International / Fits FARMALL Tractor models:Fits Cub (SN 501 thru 165152)and Fits Cub Lowboy (Up To Serial Number 1651520).Has Improved Sealed Bearings Which Never Need Grease.Can Be Made To Work On Later Serial Numbered Models But Belt Must Be Changed. 12-7/8″ diameter, 3-1/2 Inch Pulley OD, 4 Blade Fan, Double Grooved Pulley.Replaces Part Numbers: 251427R91, 251645R91, 131489C1