The Shad SH33 Top Box readily accepts most full face helmets to give you a safe and secure spot for stashing your lid. The included universal quick release mounting plate bolts up to most existing luggage racks using supplied hardware. If your bike doesn't have luggage rack, search Shad Top Case Racks for a bike specific solution. Features Thermoplastic construction Press lock quick release system Universal mounting plate included (adapts to existing luggage racks) Holds one full face helmet 17 W x 12 H x 16.5 D 33 liters 6 lb weight capacity