The Peterbilt Conventional Interior 1998 1/2 To 2009 Replacement Filter is a practical and essential product for Peterbilt truck owners. This replacement filter is designed to fit the Peterbilt Conventional Interior 1998 1/2 To 2009 Filter (CAB-19900). It is sold individually and does not include the housing. With its high-quality construction, this replacement filter ensures optimal performance and efficiency. Keep your truck's interior clean and fresh with this reliable and easy-to-install replacement filter.