【PACKAGE】: including 100 pieces curtain rail roller, plenty in number, for your daily use and replacement. 【HIGH QUALITY MATERIAL】: The curtain track wheels are made of plastic, which is durable and does not need to be replaced frequently. This is a sturdy and practical curtain device accessory, which can support curtains of commonly used sizes in the office or home. 【DESIGN】: The clever design allows the pulley to be directly installed on the curtain slide, without removing the two ends of the curtain rod, convenient and quick, without screws or extras. 【SCOPE OF APPLICATION】: These curtain rollers are suitable for most standard curtain rods and are widely used in windows, offices, bedrooms, bathrooms, etc. 【EASY TO USE】: The curtain sliders can hold the curtain firmly and the appearance is smooth, it is not easy to jam the rail when the curtain is opened or closed, slide smoothly, without too much noise.