This is a 8' Sliding Barn Door Assembly . Comes with full instructions. Easy to install! Contact me if you have any questions. Thank you for stopping by!NOTE: THIS IS ONE KIT WITH ONE SET OF ROLLERS. EACH KIT HAS (2) ROLLERS FOR ONE DOOR ONLY. Order another set of wheels for $45.00. We will build these tracks according to your dimensions as well. If you have a different size you want let us know.