Boxit is a combination of a large transport basket with a form fitted freight container lockable inside; both components can still be used individually. It comes with the premounted heavy duty version of the Snapit adapter. Within seconds Boxit converts your sport bicycle into a cargo bike with a maximum capacity of 23 kg/ 50 lbs. Boxit is available in two sizes. Caution not compatible with the narrow base of racktime Light models and Secureit. combination of a large transport basket with a form fitted freight container lockable inside Boxit converts your sport bicycle into a cargo bike with a maximum capacity of 23 kg/ 50 lbs Comes with the premounted heavy duty version of the Snapit adapter Size WxLxD 20.9x6.1x14.2 Size WxLxD 20.9x6.1x14.2