The System B currently includes 48 modules priced much lower than the sum of the modules in it. More information about each module can be found in shop page.
IMPORTANT: There are more modules in SoloRack than whats available in System B. These other modules are separate products that are sold separately. These are indicated with a red mark in the modules menu in SoloRack, the red mark will ofcourse go away if you purchase these additional modules.