Features 1、Completely adjustable rollers ensuring smooth and safe sliding. 2、It can be used with 3inch thickness doors, suitable for all brands of barn door. 3、Easy to install, fix 2 screws on the floor bottom plate, adjust and tighten. 4、Built-in bearing provides ultra-smooth rolling, convenient to use. 5、Carbon steel frame with black surface, screw matching for maximum durability. Features: Completely adjustable rollers ensuring smooth and safe sliding. It can be used with 3inch thickness doors, suitable for all brands of barn door. Easy to install, fix 2 screws on the floor bottom plate, adjust and tighten. Built-in bearing provides ultra-smooth rolling, convenient to use. Carbon steel frame with black surface, screw matching for maximum durability. Specifications: Condition: 100% Brand New Material: Carbon Steel Color: Black Thickness: Approx. 0.5cm / 0.2in Size: Approx. 12*5*6cm / 4.72*1.97*2.36in Package List: 1 * Floor Guide 1 * Bag of Screw Accessory Note: 1. Please allow 1-3mm error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, and item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard. Package List