Thank you for viewing. This is a set of urethane inserts and bottom pads for Tomix plastic cases, capable of storing two diesel cars up to 21M class. To reduce shipping costs, this is a set of 4 cases, enough for 8 cars. - Recommended for storing vehicles up to 20M class. - Cutting the notches at the ends allows for storage of diesel cars up to 21M class (for advanced users). - Trains with reduced height can also be stored, but it depends on the actual fit. - Vehicles with roof-mounted equipment cannot be stored. Please refer to the included instructions for details. The vehicles in the images are examples of storage and are not included. Nshell T-company case compatible insert set (for 4 cases) *Please be aware of high-priced resales on Amazon. Please do not purchase from them.