Track's length should be twice of the door panel's width. 6Ft track---for less than 3Ft door width. The length from the top of the door to the top of the roller is about 120mm, need at least 150mm for installation. The gap between door panel and the wall is about 16mm based on door panel thickness 40mm. Our hardware suitable for door panel Thickness.35mm - 45mm thickness (1 1/4" -1 3/4"). Hardware can bear MAX door weight: 120kgs. Satin Brushed Finish or Polished Finish. The item "Modern Style Stainless Steel Interior Sliding Barn Wood Door Hardware Track Set" is in sale since Monday, June 13, 2016. This item is in the category "Home & Garden\Home Improvement\Building & Hardware\Doors & Door Hardware\Other Door Hardware". The seller is "efeatherston2010" and is located in Thousand Oaks, California. This item can be shipped to United States.