This OEM quality fuser from Lexmark is compatible with IBM 4019, 4029, and 4039 printers. It is designed to ensure high-quality printing and prevent any defects or damage to the printer. The fuser is made with durable materials and is built to last for a long time. It is a crucial component for any printer and is responsible for the final stage of the printing process. This product is perfect for those who need a replacement fuser or want to upgrade their current one.