Features: 1Completely adjustable rollers ensuring smooth and safe sliding. 2It can be used with 3inch thickness doors suitable for all brands of barn door. 3Easy for installation fix 2 screws on the floor bottom plate adjust and tighten. 4Built-in bearing provides ultra-smooth rolling convenient to use. 5Carbon steel frame with black surface screw matching for maximum durability. Specification: Features: 1. Completely adjustable rollers ensuring smoothand safe sliding.2. It can be used with 3inch thickness doorssuitable 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 RollerHeighten 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.