Description: 【Quality and Wear Resistant】: These black sliding barn door wheels are crafted with a thickened design to ensure long term durability and resistance to wear, making them ideal for frequent use 【Smooth and Quiet Operation】: Equipped with quality bearings, these hanging rail pulley track rollers provide a smooth and quiet sliding experience, enhancing the functionality of your interior doors 【Universal Compatibility】: Designed to be universally compatible, these wheels can be used with various barn door styles, offering flexibility for different DIY barn door hardware projects 【Easy Installation】: The user friendly design allows for straightforward installation on your existing track system, making it simple to upgrade or replace your current setup without hassle 【Ideal for Interior Spaces】: Perfectly suited for interior doors, these hanging roller door runners add a touch of elegance while optimizing space in any room by allowing doors to slide effortlessly along the track Specification: Material: Nylon Steel Size Chart: Diameter: 12cm/4.72inch Inner Diameter: 1.45cm/0.57inch Package Includes: 2 Sliding Barn Door Wheels Note: Please allow slightly errors 1-2cm differences due to manual measurement.