The Carquest Premium 88770 Air Filter is a round-shaped filter designed for Peterbilt 17-25 trucks. It features advanced radial seal technology and premium quality construction, ensuring optimal filtration efficiency. With a bottom outside diameter of 12 9/32 inches and an inside diameter of 6 31/32 inches, this filter is a reliable choice for your vehicle's air intake system. The filter does not come with a gasket or seal included, but its durable design makes it a long-lasting component for your vehicle.