Features:_x000D_ _x000D_ Completely adjustable rollers ensuring smooth and safe sliding. _x000D_ It can be used with 3inch thickness doors, suitable for all brands of barn door. _x000D_ Easy to install, fix 2 screws on the floor bottom plate, adjust and tighten. _x000D_ Built-in bearing provides ultra-smooth rolling, convenient to use. _x000D_ Carbon steel frame with black surface, screw matching for maximum durability. _x000D_ _x000D_ _x000D_ Specifications: _x000D_ Condition: Brand _x000D_ Material: Carbon Steel _x000D_ Color: Black _x000D_ Optional Type: Single Roller, Double Roller, Double Roller with a Small Roller _x000D_ Thickness: Approx. 0.5cm / 0.2in _x000D_ Size: Approx. 12*5*6cm / 4.72*1.97*2.36in _x000D_ _x000D_ _x000D_ Package List: _x000D_ 1 * Floor Guide _x000D_ 1 * Bag of Screw Accessory _x000D_ _x000D_ _x000D_ Note: _x000D_ 1. Please allow 1-3mm error due to manual measurement. Thanks for your understanding. _x000D_ 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. 1Completely adjustable rollers ensuring smooth and safe sliding. 2It can be used with 3inch thickness doors, suitable for all brands of barn door. 3Easy to install, 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.