These are 4 extended height (40mm tall) feet for the Lian-li O11 Air Mini case. Also called the Air Mini. Let's you fit a radiator or fans underneath easily. The stock feet are much shorter - around 20mm. NOTE - NO SCREWS INCLUDED. It is assumed you will use the screws already holding the stock feet.Designed using Lian's own self-published STEP files (3D model file format) for their o11 Air Mini case as found linked on the product page for this case on Lian's website. Guaranteed to fit! These feet will NOT FIT any of the other Lian-Li cases as far as I am aware from checking the look of each model.