I measured it especially for you with the calliper gauge. The accessories have an inner diameter of approx. 30 mm and an outer diameter of 35 mm. Accordingly, you cannot insert the parts into the inside of your suction cup. The flexible hose is also designed for an outer diameter of approx. 30 mm on the suction side. Long story short: Unfortunately, it doesn't fit.

If the connection piece, or an adapter piece, from the other device has an outer diameter of 31 mm, most parts of the set will probably be attachable.

Unfortunately, no.

No. Is according to description for: Move hand vacuum cleaner Readyy'y 2in1