smartstandard 6.6ft heavy duty sturdy sliding barn door hardware kit -smoothly and quietly -easy to install -includes step-by-step installation instruction fit 36"-40" wide door panel (i shape hanger) smartstandard <b>if you want to buy extra sets of i-shape hanger to install more doors, please buy our i-shape hanger( asin: b01loczei0 listing link: https://www.amazon.com/dp/b01loczei0 ) ,this i-shape hanger is compatibale with our i-shape sliding door hardware kit.<b><br><br>this new smartstandard country black steel sliding barn wood door hardware can transform your doorway into a side sliding entry. this is a popular new way to bring innovation into the home and close off bedroom and side room in a stunningly unique way. <br> 1. hole spacer of the rail is 16". it is good for the wall stub. <br> 2. detailed instruction: use both words and pictures to display the steps of installing the barn door hardware. <br> 3. all the measurements are in inch rather than in centimeter. <br> 4. all our products have "smartstandard" logo on the package. <br> <br> <b>brand:smartstandard</b> <br> <b>important: </b> only smartstandard is the legal seller of this product. all product from other sellers are fake imitation and not under warranty policy.