: These plastic curtain track glider are made from sturdy plastic with a smooth surface,and the hanging rings are made from stainless steel,which is strong for long-term use. They have a strong load-bearing capacity,are not prone to breaking,and can maintain smooth and quiet sliding within the track for extended periods : The ceiling sliding curtain track hooks are designed with simplicity in mind for a quick installation process. Simply push the rollers gently into one side of the track,ensuring smooth gliding,and the installation is complete,saving you time : The diameter of the surface of the shower curtain pulley is 10.5 mm / 0.41 inch,which is suitable for small curtain tracks,allowing you to use them for various types of curtains in your home : The curtain track hooks can be applied to small rails and are suitable for shower curtains,door curtains,windows,wardrobes,sliding doors,etc : 100 x curtain track rollers. You don't have to worry about running out of quantities,allowing you to hang curtains easily and efficiently.