ALLZONE is the premier supplier of spring loaded tension rods on the market today. We have created a variety of tension rod sizes to help you find the perfect rod for your space. Our tension rods present such creative and easy way to hang curtains in minutes. No drilling required. Very Sturdy and Never Drop Down. Special treated against the rust and it can be Rust Free for many years. Simply adjust the rod to the size of your space and let the spring loaded tension do the rest! Specification: Material: Made by Powder coated steel pipe,Anti-corrosion and rust free Size: Expands from 28-41'' as flexible. Installation:Free punching, no drilling required. Quick and Fast. Shipping List: 1.(1) 28-41''spring tension rod..2. (2) Rubber end cap..3. (1)User manual