This Lawnflite mulch plug is designed to help you recycle your grass whilst mowing. With the mulch kit fitted the lawn mower will cut then re cut the grass clippings into very fine pieces which are deposited back on to the ground. These tiny pieces virtually disappear into your lawn providing the extra nutrients and moisture needed for healthy root growth.This mulch kit will fit the following Lawnflite push Smart lawnmowersSmart 40POSmart 46PO