Curtain track roller: You will receive 20 curtain track rollers of the same size. The wheel diameter is 14.5 mm, the outer diameter is 17.5 mm. Suitable for curtain tracks with a width of 18-23 mm. Installation is easy: simply insert the pin hook into the eyelet on the bottom of the bracket. For curtains with holes or loops on the back, simply add hooks. The track rollers slide smoothly and do not get stuck. Scope of application: The roller can be installed on windows in the living room, study, bedroom, office, piano room, and dining room, allowing you to easily draw your curtains for a beautiful morning. Quiet design: Thanks to the double-layer, low-noise design of the slide track, the roller produces minimal noise when drawing the curtains. When you get up and open the curtains in the morning, you will not hear a loud noise. Sturdy material: Made of high-quality plastic and stainless steel, durable and rust-resistant. Thanks to the excellent load-bearing capacity, all curtains glide