The Shad top case mounting plate is for Shad's largest top boxes. All Shad top boxes come as standard with their relevant mounting plate (except TR37 & TR48), but a spare plate enables you to easily switch your top box from one bike to another. This product is also shipped with a set of bolts & fixings to fasten the mounting plate to your fitting kit or luggage rack. Compatible Top Boxes: TR37, TR48.