John Deere Original Equipment Insert #M131163John Deere Mulching Insert. Replacement Insert for 42-inch Mower Deck with BM21816 Mulch Kit Installed. This item is in the category “Home & Garden\Yard, Garden & Outdoor Living\Outdoor Power Equipment\Snow Blowers”. The seller is “bombergersstore” and is located in this country: US. This item can be shipped to United.