Hi, JanKlaška!
Thanks for reaching out to Microsoft Community and posting your inquiry regarding the Type Cover for your Surface Pro (5th Gen). I am afraid to inform you that the Surface Pro X Keyboard is only compatible with the **Surface Pro X.**The existing type-covers for the Surface Pro line (3, 4, 5th Gen, and 6) are not compatible with the Surface Pro X connector.
The Surface Pro X Keyboard's blades/connector looks like this image below.
The Surface Pro keyboard connector will look like the one below.
Kindly check with the **Microsoft Store**on availability of Type Covers for your Surface Pro (5th Gen). We hope this helps you out.
Kind regards,
Janette_Z