The picture is about one kind of curtain rod, which has a solid quality. The details are shown in the following: Diameter: 6.6cm Length:7/9.9cm Width: 6.6cm Height:6.6cm Colour: Zinc Telescopic rod:single curtain rod & double curtain rod Inner ring:Recommended 8 per meter Support: Customer-defined Screw: Normal screws & allen screw We are one of the China curtain rod supplier, welcome to your come and purchase!