Package contents: you will receive 20 pieces white orange curtain rail rolls, enough to fully assemble your curtains, reusable. (The product size is 35 x 15.2 x 7 mm, please confirm the need before ordering.) Bearing wheel: The bearing wheels are designed to reduce sliding friction and thus produce less vibration and noise, resulting in smoother gliding. Create a quiet and elegant living environment for you. Easy to install: choose a suitable curtain rail and slide the curtain roll from above into the curtain rail, suitable for rod curtain rails, the carrier moves easily from rail to rail, open to close. The hook loop under the large curved wheel of this curtain track rotates 360 degrees, so you can move the curtains effortlessly. Can be used with curtain clips and curtain hooks. Wide range of applications: the curtain rail gliders are suitable for curtains and rod curtains, suitable for most curtains that need curtain hooks. Can be used in most curtains, shower curtains, curtains, door curtains and French curtains.