It is best to check the dimensions of your speakers with the technical sketch and the instructions and whether your speakers can even be mounted appropriately with the various mountings of the stands. Regarding the weight, I recommend reading the various reviews here on Digitec, the manufacturer's specification of 5kg seems very optimistic.

Instructions: https://www.hama.com/webresourc...
Technical drawing: https://www.hama.com/webresourc...
Manufacturer's page: https://www.hama.com/00049594...