I have a brand new, never used original OEM John Deere Mulch Cover Kit, model GY20417. This is for the 48" mower deck. It is very easy to install (just two rubber cords). This kit allows you to mow leaves and mulch them into very small pieces which in turn adds nutrients back to the soil and grass. Hence it keeps you from having to rake all the leaves in your yard. The cheapest I found this piece (an actual brand new, John Deere OEM part, not a knock-off) was on ebay for $42. Selling at a discount for $25.