The product is a Mack 20705743 Big End Bearing Shell that fits both Mack and Volvo engines. This particular item is classified as new old stock, meaning it is a previously manufactured part that has not been used but may have some minor wear or aging. It is important for commercial truck owners and mechanics to have access to high-quality engine bearings like this one to ensure smooth and efficient engine performance. With the trusted brand of Mack and its compatibility with both Mack and Volvo engines, this bearing shell is a reliable option for those in need of replacement or maintenance parts.