IKEA LACK 30×26 cm shelf: the 3 kg rating depends on your wall fixings
For the white LACK 302.821.78 wall shelf, the stated maximum load is 3 kg depending on wall and fastening. Hidden brackets are included; wall screws are sold separately.
Official IKEA link for this LACK shelf's assembly guidance and load warnings.
Text link card to official IKEA product information
Open source ↗Preventing a falling shelf starts with choosing the correct fixings for your wall. IKEA advises professional help if you are unsure. This guide does not prescribe anchors for an unknown wall.