Item Type: Sliding Barn Door Hardware Roller Set Weight: 628g / 22.15oz Material: Carbon steel, ABS Package List 2 x Pulley 2 x Stopper 2 x Anti Jump Block 4 x Explosion Proof Bolt 15 x Screws 2 x Limiters 5 x Pipe Clamps 1 x Hex Wrench 1Super Quiet: This pulley set with special materials and design, can effectively reduce the noise generated when sliding, to maintain a quiet indoor environment, so you will not disturb others when using DIY fitness equipment. 2Smooth Sliding: The sliding heavy duty door roller are made of premium sliding rollers to ensure smooth and easy opening and closing of the door. You can easily open or close the barn door and enjoy a smooth sliding experience. 3Resistant to Heavy Loads: This heavy duty door pulley has good load bearing capacity and can withstand the weight of the door. Whether you use heavy fitness equipment or other heavy objects, you can easily install on the door to ensure safety and stability. 4Durable: This pulley heavy duty door pulley is made of prime material, which has excellent durability. It is not easily damaged or rusted, and can be used for a long time to extend the service life of the product. 5Easy to Install: Uses simple installation operation, you can install it yourself without the help of professionals. Save the installation cost, and also convenient for you to adjust and replace according to your needs.