Takigen
Takigen FD-77-TB Aluminum Assembled Box Components Series

Manufacturer: TAKIGEN MFG.CO.,LTD.
Model: FD-77-TB
Features
Components that can be used to create the framework for boxes and doors.
You can create the size you want by specifying the length of the frame.
The corners and straight sections both have rounded outer edges, which not only adds to the design but also makes it less likely to cause injury when the body comes into contact with them.
Made from aluminum, it is lightweight.
Easy to assemble with screws.