Features: 1. Completely adjustable rollers ensuring smoothand safe sliding.2. It can be used with 3inch thickness doors,suitable for all brands of barn door.3. Easy for installation, fix 2 screws on thefloor bottom plate, adjust and tighten.4. Built-in bearing provides ultra-smoothrolling, convenient to use.5. Carbon steel frame with black surface, screwmatching for maximum durability.Specifications: Condition: 100% Brand NewMaterial: Carbon SteelColor: BlackOptional Type: Single Roller, Double Roller,Heighten Single RollerThickness: Approx. 0.5cm / 0.2inSuitable: for 76mm / 3in thickness sliding doorSize: Approx. 10.5 * 4 * 5cm / 4.1 * 1.6 * 2inPackageList: 1 * Floor Guide1 * Bag of Screw AccessoryNote:1. Please allow 1-3mm error due to manual measurement. Thanksfor your understanding.2. Monitors are not calibrated same, item color displayed inphotos may be showing slightly different from the real object. Please take thereal one as standard.