[Size Compatibility] Before making a purchase, it's crucial to measure your curtain rail track to compatibility. Our rollers are designed with a width of 0.79 inches (20mm), and they fit tracks with an inner width of at least 0.94 inches (24mm), providing a seamless sliding experience. [Premium Construction] Constructed from high-quality zinc alloy, our ceiling mount curtain track rollers are built to last. They feature bearings encased in silent rubber, making them to rust and moisture. This design ensures they are suitable for both indoor and outdoor environments, providing long-lasting functionality. [Silent Operation] Experience a quieter environment with our rollers that incorporate bearings wrapped in silent rubber. This design not only enhances the smoothness of the rolling but also significantly reduces noise, making them perfect for use in quiet spaces like bedrooms and meeting rooms. [Versatile Use] Ideal for a variety of applications, our curtain rollers are perfect for hanging curtains, door curtains, shower curtains, and drapes. They are suitable for installation on ceilings and can be used in diverse settings such as French , balconies, RVs, bathrooms, room dividers, studios, and stages. Color: As Shown Material: Metal Package Contents: 15 Pack Ceiling Curtain Rollers Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.