Disc Opener Hub, made form ductile iron, installed With H281813 double row ball Bearing. For John Deere Grain Drill, Fits Models 1560, 1590, 1690, 1860, 1890, 1895, 1990 Replaces OEM# AN281856

4 squre holes (0.42" X 0.42") equal spaced on pitch circle diameter 4-3/8"