Barn Door Hardware Black Steel I-Shaped Rollers Track Rail Bypass Sliding Barn Door Hardware Kit 1.83M Upgrade your space with our Black Steel I-Shaped Rollers Track Rail Bypass Sliding Barn Door Hardware Kit. Crafted from super-quality raw steel castings with a track thickness of 6mm, this hardware kit offers exceptional carrying capacity, with a maximum load of 330 pounds. Perfect for bypass barn single or double doors, it's easy to install and comes with all the necessary accessories and detailed instructions. Installation Requirements: The distance from the top of the door to the ceiling should be approximately 16cm Baseboard thickness should be around 2cm Door thickness should be between 4-4.5cm Accessories: For Single Door:Track length = Door width x 2 + 10cmTrack length = Opening width x 2 + 20cm For Double Door:Track length = Door width x 4 + 20cmTrack length = Opening width x 2 + 20cm Installation Tools (to be prepared): Impact drill Spirit level Tape measure Socket wrench Hammer Pencil Screwdriver Reminder: This kit includes hardware only, door panels not included. Suitable for single doors. The track and wall connectors are pre-fixed and not adjustable. Designed for interior use only. Packaging Contains: 1 x Barn Door Hardware Set 1.83M 1 x Instruction Manual * This accessory requires opening the bottom of the barn door (size 20mm x 7mm) in advance.