4 Piece Sliding Door Floor Rails, Adjustable, Great for Sliding Doors

[Easy to Slide]Smooth bearings can slide easily and then slide open the door without any trouble. The floor rails are flat on the bottom, will not damage the door and floor, and slide smoothly and quietly.[Suitable for]Adjustable sliding door rollers, the minimum spacing is 2.5cm, and the maximum spacing is 3.5cm[Easy to Install]The door does not need grooves, just fasten two screws to the bottom bar, and then tighten the roller guides to fix it in place.[DURABLE PREMIUM MATERIALS]Black coating resists abrasion and provides longer life.size:15 x 7 x 5.5 cmMaterial:Metalcolour:blackPackage Contents:4 * Pulley guideOnly 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 +/- 1-3cm.