I would avoid any sellers advertising as AXA, BXA, CXA etc each suplier can have different sizes.
BXA alone presume theyre 200 Series and in that theres 200/100 and 200/200 plus any unisted just mention for centre height. Tool holders wont fit from else where.
If bought tool holders from say Machine Dro they wont fit they just sell on centre height with no numbering, been there got caught out twice.
The Warco linked are 250/200 so the proper ones that can be bought elsewhere £5.5 ea cheaper delivered. Usually get mine from Gloster Tooling 5 off £95 delivered that would be around £37 cheaper.
Now the 250/200 part relates to 200 as the type of holder, think 201 is a V, therefore just merely shop online looking for holders 250/201, 250/203, 250/207 etc and guarantee fit.
Unfortunately i gave 4 250 series tool posts away over the years complete with the naff parting blades and tool holders. One went on a WM290