English:Quality and size: the plastic roller made of quality material, you won't worry about ruining your beautiful curtains; Dimensions are approximate. The diameter of 14mm curtain track wheel is 14mm What you get: you can get several curtain track rollers (not including long tracks) to suit large curtains, specific quantity compatible with your choice, as well as use compatible with each of your houses, enough numbers for gifts to your family and friends as well Smooth gliding: these curtain track rollers can roll freely and glide smoothly within the track; The curtain tracks are applied in a variety of track shapes and glide very smoothly Versatile use: these flexible ceiling curtain tracks look good in most settings; Curtain rails are good room compartments, window decorations, shower rails, trailers or the most compact space that increases your space, giving you instant privacy Simple installation: easy to use, check the appropriate size of your home compatible with the installation, suitable compatible with the beam curtain rail; The carrier moves easily from rail to rail, from open to closedColour: whiteMaterial: plasticSize: total height about 40mmPackage Contents:50 x Ceiling Curtain RailOnly the above package content, other products are not included.Note: Light shooting 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 +/- 1-3 cm.