S for small, and more importantly, S for Screw-in Stabilizers!
These are intentionally thinner than your normal O-Rings to allow the use of the screw-in stabs on the backspace and spacebar keys.
Please check the below chart to verify compatibility. If the keyboard is not on the chart, you are buying at your own risk.
Fit with Screw-in Stabs?
||Fit with Plate-mount Stabs?|
|Monokei Kei||M-sized - 35A or higher||M-35A or higher|
|TGR x SINGA Unikorn||S-sized||M-sized|
|ZekkWorks Ogre||S-sized||M-sized - 45A or lower|
|Maker Phantom65||M-sized - 30A (unless you Dremel mod)||M-sized|
|Hand Engineering Haus||TBD||M-sized|