Abs on my k10, the product page should say. I have mine a fair shake but finally swapped them yesterday. I prefer the harder textured feel of pbt (stock set on my ducky one2) and had a set that I bought on clearance a while ago and finally put on.

The keychron caps broke in a bit with use and got less smooth but I still don't readily like them.

9 months with this board, used 3-4 days a week for work but not continuous typing