Parametric spool rack for Ikea Kallax shelf

I was looking for an efficient storage system for my apartment to go with my Kallax shelf.

I found nothing suiting my needs so I designed this spool holder or rack. It can be used as a spool storage rack or as a spool holder to unwind filament to your printer

It goes on top of an Ikea Kallax shelf and uses the existing screws and holes so no need so sacrifice it.

I went with a 16mm electric pipe to hold the spools. 

Mounting : 

Just cut a length of pipe equal to the depth of the shelf and put it through the round holes of the brackets.

Unscrew the top screws of a side , insert the brackets and put back the screws with the added brackets

List of components : 

16mm electric pipe or any rod you want to use (make sure to adapt the parameter to the diameter you use)

2 brackets (to print)