Features: 1. Super Quiet: The pulley block is made of special materials and design which can effectively reduce the noise generated when sliding and maintain a quiet indoor environment. 2. Smooth Sliding: The pulley wheel uses smooth sliding rollers to ensure smooth and easy opening and closing of the door. You can easily open or close the barn door. 3. Strong Load Bearing Capacity: The pulley has good load bearing capacity and can withstand the weight of the door. Suitable for heavy-duty applications. 4. Durable Structure: The heavy-duty pulley block is made from high-strength carbon steel material which has excellent durability. Resistant to damage and rust, designed for long-term use. 5. Convenient Installation: The heavy-duty pulley block features a simple installation process, allowing for easy self-installation. Designed for easy adjustment and replacement. Specification: Item Type: Pulley Block Material: Carbon steel Weight: Approx. 1219g / 43oz Package List: 2 x Pulley Block 4 x Screw