Durable Material: Carbon steel roller, premium nylon roller wheel, high strength industrial grade sliding track, can easily support 150kg load-bearing. Surface Wear and rust frosted black. Product item ：The barn door kit for double door.Sliding rail thickness: 5.8mm. Roller diameter: 69.9mm. . Sliding rail track width: 39.9mm. Fit for door panel thickness: 35 mm-45 mm.（ Fit door panel width: The length of rail track should be four times of the door panel). Safety designs：Complete barn door hardware kit, Has buffering effect when sliding door, reduce noise，anti-bounce device between the door and the track helps avoid the door skipping off from the track during sliding; durable floor guide keeps the door in balance and stable. It won't wobble. Easy to Install Widely Used: Our kit includes anti-jumpers ，floor guides ，door stoppers includes all necessary hardware（The door panel is not included）Suitable for indoor and outdoor spaces, such as bedrooms, dressing rooms, kitchens, barns, garages, and stables. Professional Service : We offer 5 years warranty. Any problem during using it,Please contact us，Our professional customer service team will follow up and solve any problems for you within 12 hours., Weight: 11.0231131 Pounds, Manufacturer: betensh