Sonder 129 curtain track is made of Aluminum Alloy material, the bracket is refined steel, there are 4 colours for you to choose. Curtain rod design wirh curtain track rollers. You can choose eyelet blockout curtains outer with pleated sheer curtain inner. You can choose opening centre or opening one way according to your need. The track rollers can move acros under the bracket. The tambour finials are very beautiful. Sonder curtain track is capable to support 40kg curtains and could be used for more than 20 years.