QYR4120 Curtain Rod Set is made of Aluminum Alloy material and has 1-1/8" diameter, 0.079" thickness. The bracket is made of Metal. The surface is produced by Spray Paint. Very thick rod is better for load bearing. QYR4120 curtain rod is capable to support 40kg curtains and could be used for more than 20 years. The bracket is very beautiful, and the antique design can add artistic flavor to your room, you will like it.