Wire Shelf Rack Leveling Feet Inserts

I created these for my desk which is made from a wire rack shelf. My desk is in a basement and the floor is very uneven. I created (3) different sizes to allow for minimum thread exposed of the screw-in feet. The less thread exposed means more stability.

I used store-bought 3/8-inch threaded furniture feet. Something like this:
https://www.amazon.com/Furniture-Levelers-Adjustable-Leveling-Threaded/dp/B09B2F13BR/ref=pd_lpo_sccl_2/131-7342784-5135637?pd_rd_w=YHdOv&content-id=amzn1.sym.116f529c-aa4d-4763-b2b6-4d614ec7dc00&pf_rd_p=116f529c-aa4d-4763-b2b6-4d614ec7dc00&pf_rd_r=WYDVRCYDFAHPDG7HS3H8&pd_rd_wg=IAaUA&pd_rd_r=70744ec1-3bf5-4364-8a5e-0e3dd24bce07&pd_rd_i=B09B2F13BR&th=1

Dimensions of my wire rack upright tubes:
- OD: 26mm
- ID: 22.5mm, 22mm (rib inside)

Lift-Height (not including height of foot that screws into these inserts):
Small: 3mm
Medium: 28mm
Large: 38mm