<br><b>3 pack of USA made mulching blades for the Grasshopper 52" mowers. These blades are 18" long with a 1/2" center hole.</b> <br><b>These blades replace Grasshopper part #s 320236, 320237, and 320239.</b> <br><b>Fits Models GRASSHOPPER: 3 for 52", 3452, 6052, 9052, 9252, 9352, 9552, 9652, 9852 WOODS/HESSTON: </b> <br><b>3 for 52" THICKNESS 0.2040" LENGTH 18" C. H. DIA 1/2" WIDTH 2-1/2"</b>