Material： The curtain track pulley is made of plastic and alloy, which is wear-resistant and rust-proof, providing strong load-bearing capacity, moisture-proof and sun-proof, and long service life.Packaging Information： You will receive 30 pulleys of the same size, with a width of 18.2 mm and a wheel diameter of 14 mm, suitable for curtain tracks with a width of 30 mm.Silence： When you pull the curtains, the rollers slide smoothly and quietly, creating a quiet and elegant environment.Easy Installation： The curtain track pulley is very easy to use: for pleated curtains with pin hooks, simply insert the pin hook into the eyelet at the bottom of the product. For curtains with eyelets or rings on the back, simply add hooks. Wide Application： The curtain pulley can be installed on the windows of living room, study, bedroom, office, piano room and dining room, and can be easily closed to make every morning more beautiful.