Givi V47NN 47ltr Monokey Top Case w/Carbon Fiber accent Matte Black Top Case with Silver Trim, Red Lenses and Faux Carbon Fiber Top Panel The V47 case has a 47 liter capacity and can hold two full face helmets. The dimensions of this case is: 23.2" x 17.7" x 12.6" Requires Bike Specific or Universal Monokey Mounting plate to install (sold separately)