The OM06 is a bottle storage module that can work on its own but it is designed to be stacked atop storage modules that are part of HobbyZone Modular Workshop System. This module serves as a corner module to change the arrangement of the Modular Workshop System by 90 degrees and can be stacked with the OM03 and OM04 modules. Modules connect using magnets that are included and you can always change the configuration of the modules according to your storage needs. This module comes in kit form, consists of precision fitted parts and assembly instructions. Wood glue is required for assembly (not included).