Smooth sliding: these curtain track rollers can roll freely and slide smoothly inside the track; Curtain rails are applied in a variety of track shapes and slide very smoothly Versatile use: this ceiling flexible curtain rails look in most environment; Curtain tracks room compartments, window decorations, shower tracks, trailers, or most compact space that increase your space, giving you instant privacy Quality and size: The plastic roller of quality material, you 't worry about your beautiful curtains; The dimensions are approximate.The wheel diameter of the 14 mm curtain rail is 14 mm What do you get: can you get several curtain track rollers (not including long tracks) to fit large curtains, specific quantity for , as well as use for each of your houses, enough numbers to also give away to your family and friends Simple installation: easy to use, check the suitable size of your home for installation, suitable for beam curtain track; The carrier easily moves from track to track, from open to close