This product is a brand new, unopened gasket with the manufacturer part number 120MF255A from Mack. The product is still sealed in its original packaging and is being sold as a new old stock (NOS) item. The packaging does show signs of age. This gasket is designed specifically for commercial trucks and is a genuine Mack product, ensuring quality and compatibility with the vehicle. It is perfect for those in need of a replacement gasket for their Mack truck.