Track's length should be twice of your door panel's width, please select the length based on the door panel or opening. The gap between THK 40 mm door panel and the wall is about 16 mm, height from the top of the door panel to the top of the roller is about 130 mm for reference. Only the hardware is for sale. International buyers please note: a. Customers should contact our Customer Department within 14 Days after receiving the item.During the period we would like to accept return in the following cases: such as goods are in good condition and don't affect secondary sales, quality defects or other problem. Customers' issues such as: no longer needed, don't like, bought by mistake, etc. Our staff will do unpacking and inspection for your return goods ASAP. Thanks for your patience and cooperation. The item "5-16FT Antique Top Mount Black Wheel Sliding Barn Door Hardware Steel Roller New" is in sale since Tuesday, March 13, 2018. This item is in the category "Home & Garden\Home Improvement\Building & Hardware\Doors & Door Hardware\Other Door Hardware". The seller is "saledecoration" and is located in CA. This item can be shipped worldwide.