Curtain track rollers: You will receive 20 curtain track rollers of the same size. The wheel diameter is 14 mm, the outer diameter is 18.2 mm. They are suitable for curtain rods with a width of 18-23 mm. Installation is child's play: simply insert the hook into the eyelet on the bottom of the bracket. For curtains with holes or rings on the back, simply add hooks. The track rollers slide smoothly and do not get stuck. Application: Installed on windows in the living room, study, bedroom, office, piano room, and dining room, they allow curtains to be closed easily and ensure a wonderful morning. Quiet design: Thanks to the double-layer roller track, the rollers produce minimal noise when the curtains are drawn. When I wake up in the morning and open the curtains, I no longer hear a screeching noise. Sturdy material: Made of high-quality plastic and stainless steel, they are durable and rust-resistant. Thanks to their excellent load-bearing capacity, all curtains glide smoothly on the