Commercial mower mulching blade, with teeth for maximum mulching capability replaces Grasshopper 320236, 320237 and 320239. This mulching mower blade fits 52" cut Grasshopper commercial mowers. All mower blades are sold individually. Order a quantity of (3) blades for Grasshopper 52" deck. Match the OEM number from your machine's manual to be sure you get the right mower blade every time.