It can be used with 2-inch thick doors, suitable for all brands of barn doors. Fully adjustable rollers ensure smooth and safe sliding. Sliding door track Easy to install, fix 2 screws on the bottom plate of the floor, adjust and tighten. Sliding gate guide Carbon steel frame with black surface, matching screw for maximum durability. The built-in bearing provides ultra-smooth rolling, convenient to use. Features: 1. Fully adjustable rollers ensure smooth and safe sliding. 2. It can be used with 2-inch thick doors, suitable for all brands of barn doors. 3. Easy to install, fix 2 screws on the bottom plate of the floor, adjust and tighten. 4. Built-in bearing provides ultra-smooth rolling, convenient to use. 5. Carbon steel frame with black surface, matching screws for maximum durability. 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, item color