The file 'Stackable Shoe Rack – Ikea Slats 70×20 3D Printer Model' is (stl) file type, size is 11.8KB.
Adapted the original to fit 2x IKEA Kura bed slats 70x20mm as I had some from an old bed.
Fit varies if the slats have expanded over time, some were tight and some a tiny bit loose - in which case I just used a dab of glue.