Track's two end had been pre-drilled small holes for track connector to make a long trac. Suitable for door thickness:35-40-45mm. Soft close kit can bear MAX weight 80kg.We had pre-fixed soft closet set with track to make full system easy for installation. For more detailed installation information, pls kindly check our manuel in photo. We also have this BLUE door panel in stock, pls kindly check our store for more door selection! The item "5FT Soft close sliding barn door hardware spoke wheel two side soft close track" is in sale since Monday, December 26, 2016. This item is in the category "Home & Garden\Home Improvement\Building & Hardware\Doors & Door Hardware\Other Door Hardware". The seller is "shengyinhardware" and is located in Carol Stream. This item can be shipped to United States.