Check the listing for details. 4FT-20FT Medium Wheel Roller Sliding Barn Door Hardware Kit Single/Double Door. Color: Black, Condition: New. Listed at 59.90 USD. 4-20FT Sliding Barn Door Hardware Kit Single Double Doors ( NO DOOR) Material： Track-- Carbon Steel, Black Roller--High quality steel wheel material--Premium nylon Door Max Weight Capacity: Up to 330lbs every pair rollers Fits sliding Door Thickness: From 1 3/16" to 2" The top of the Doors to the ceiling : Min distance is 6" Package Includes: SINGLE DOOR Spliced rail with pre-drilled holes Rollers: x2 Door stops: x2 Anti-jump disks: x2 Floor guide: x1 Wall hangers+ Track Screws + Wood plugs ( according the track holes quantities) Install instruction: x1 DOUBLE DOOR Spliced rail with pre-drilled holes Rollers: x4 Door stops: x4 Anti-jump disks: x4 Floor guide: x2 Wall hangers+ Track Screws + Wood plugs ( according the track holes quantities) Install instruction: x1 Tips : Only sliding door hardware kit, don't include the Door. How to Choose Track Size: Track's length should be twice of door panel's width (like your door width is 2FT, You will need 4FT hardware Kit ) 【Note：】 Single door= 2 X single door panel width (Like your door width is 3FT, you will need 6FT length kit) Double door= 4 X single door panel width (Like your door width is 3FT, you will need 12FT length kit)