1 Inch Iron Pipe 1-inch diameter iron pipe can hold up to 30 pounds without distortion Matte Texture The surface of the iron pipe is uniformly painted with a matte finish to bring the texture up a notch. Unique Aluminum Alloy Brackets Aluminum alloy bracket is more sturdy and durable, better load- bearing capacity than ordinary iron bracket, will not fall from the wall, will not be rusted Allen Key Secure the Rod Equipped with a small allen key to tighten the screws on the bracket can easily fix the curtain rod without the risk of the rod falling down. Adjustable Length The telescopic construction allows the 36-72 size curtain rods to extend up to 72 inches long, and the 72-144 size curtain rods to extend up to 144 inches long, you are free to adjust the length of the rod according to the width of your window.