The product is a lot of 10 Tyco slot car track transition pieces, specifically model B5879X. These pieces are designed to allow slot cars to transition between different types of track, making it easier to create complex and exciting racing layouts. Manufactured by Tyco, the pieces are compatible with HO scale slot cars and are essential for expanding and enhancing your slot car racing experience. Perfect for enthusiasts of slot car racing, these transition pieces provide endless customization options for creating unique and thrilling tracks.