This replacement filter is designed specifically for Mack MR, RD, R, DM, RB, and RS models manufactured between 1973 and 2011. It is sold individually and does not include the housing. The filter is a practical solution for maintaining the optimal performance of your Mack truck. With its precise fit and high-quality construction, it effectively filters out impurities, ensuring clean and efficient operation. Trust this replacement filter to keep your Mack truck running smoothly for years to come.