Décor Depot 19-22 mm Tension Rod (White)(0.7-1.2m)

Tension rods are spring-loaded, and they can be adjusted to exactly the right width for your window. The rubber tips on either end help to keep the rod from slipping and also serve to protect your wall or trim from damage

A great, non-permanent option for many applications.
Easy to install
No drilling or installation required
Expands to 2.1m
Maximum weight is 10kg
Also available in white
Ideal for any room.