High quality material: The rail curtain hooks are made of high quality, chemically stable, wear-resistant plastic. These curtain track sliders will not rust or dirty your curtains. Design: The sliding curtain hooks have a resealable buckle, so there is no need to worry about the curtain being rolled down from the hook, the sliders roll smoothly and tightly. Easy Installation: These curtain hook gliders can be easily added to curtain tracks. Simply insert the carrier rollers into the rail from the end of the rail, you don't need any other hardware tools. Easy to use: The curtain hooks can hold the curtain tightly, and the appearance is smooth, it is not easy to jam the rail when the curtain is open or closed, pull the curtains quickly and easily. Champ d 'application: These curtain sliders are suitable for most standard track, and are widely used in windows, bathrooms, offices, bedrooms, etc. Note: The data is all manual measurement, please please allow 1 - 3cm error, due to the light and display difference, there will be some color difference, depending on the physical object received.