Usage Tips:Quality and size: The plastic roller of quality material, you ' worry about your beautiful curtains; The dimensions are approximate.The wheel diameter of the 14 mm curtain rail is 14 mm What do you : can you several curtain track rollers (not including long tracks) to fit curtains, specific for , as well as use for each of your houses, enough numbers to also give to your family and sliding: these curtain track rollers can roll freely and slide smoothly inside the track; Curtain rails are applied in a of track shapes and slide smoothly Versatile use: this ceiling flexible curtain rails look in most environment; Curtain tracks room compartments, window decorations, shower tracks, trailers, or most space that increase your space, giving you instant privacy Simple installation: easy to use, check the suitable size of your home for installation, suitable for beam curtain track; The carrier moves from track to track, from open to Colour: white Material: plastic Size: height about 40mm Package Contents: 50 x Ceiling Curtain Track Only the above package content, other products are not included. Note: Light 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.