Specifications:Inside the rod spring is after phosphating electroplating won't rust.Easy installation without any tools, no damage to walls or doors and windows.Non-slip rubber on both ends, make the rod more strong, not easy to fall off.Installation:Extending the length of pole to the required length. (More than about 2~3cm to the door's length).Making the curtain through the rod.Fixing one end of pole, the other is 45 angle with the door.Push the other end of pole up, make it be parallel with the door.Type: Tension RodMaterial: IronThe Most Loading Capacity: about 1 kgFeatures: No Tool Needed, Durable, Easy InstallationLength(Optional):30cm - 50cm/11.81" - 19.69" (Approx.)40cm - 70cm/15.75" - 27.56" (Approx.)55cm - 90cm/21.63" - 35.43" (Approx.)70cm -120cm/27.56" - 47.24" (Approx.)