MTD Craftsman 931-1833A Lawn Mower Mulching Door for Craftsman, Genuine Original Equipment Manufacturer (OEM) Part Mulching door 931-1833A attaches over the side discharge chute and when closed, is used for mulching Genuine Original Equipment Manufacturer (OEM) part. Compatible Brands: Craftsman, Mtd This manufacturer-approved mulching door (part number 931-1833A) is for lawn mowers Wear work gloves to protect your hands when installing this part