Our tension rod size is 68-100cm/26-39inch,1pcs included 1* 2 Rod (1.7cm diameter outer rod with 1.2cm diameter spring inner rod).Shower curtain poles can be used for 68-100cm, just extend and adjust the length according to the size of your window.Tension rod for curtains are made of premium High-carbon steel. And each rod is treated by a paint-baking process.Adjustable Curtain Pole Rubber Anti-skid Base is very firm, Suitable for Glass, wooden walls, marble, lime wall, and ceramic tile.