Ikea Kallax Booster

I saw a booster not too long ago but wanted to create my own and so I did. 

You'll need to print two and then print another two but mirrored. 

You can use the screws to hold it into place. 

I also created shorter ones for the back or if you only want half the size. 

I'd suggest 50% infill. 

They screw in from below.