I want to buy a clamping kit for my 6040 Chinese CNC, but I am totally confused with which size to buy.
The T slot has following dimensions:

<work surface>
-------- ---------
| X |
-------- ---------
| Y |
----------------------

I hope above looks like a T-slot.
The stud should go through X and the T nut head should fit Y.

In my case X is 8.3mm, y is 13.6mm.

Which kit should I buy?