4 Package include two kind roller screws to suit for 35-40mm / 40--45mm thickness door panel. 5 All other necessary hardware is included as you see in the pictures. The item "8 Ft country Sliding Barn Door Track And Hardware" is in sale since Friday, April 07, 2017. This item is in the category "Home & Garden\Home Improvement\Building & Hardware\Doors & Door Hardware\Other Door Hardware".The seller is "tccfire15" and is located in McKinney, Texas. This item can be shipped to United States.