4" Spool, Fits 1-1/8" Square Axle, Square Hole, Machined Bearing Surface, for Case IH Disc Harrow Models with 7-1/2" and 9" Spacing, Fits Models 37, 46, 48, 60, 61, 76, 120, 122, 130, 132, 150, 330, 350, 370, 470, 480, 610 & 760 Replaces OEM# 472591R3