NOTE: Door and Install Tools are not included in package.Top Mount Roller Bifold Sliding Barn Door Hardware Kit Black Flat Track Modern 3ft/36" Rail for 2 doors kit fit less 17" wide door, use three bifold hinges to connect two 17" doors.2.5ft/30" Rail for 2 doors kit less 14" wide door3ft/36" Rail for 2 doors kit less 17" wide door3.3ft/40" Rail for 2 doors kit less 19" wide door3.5ft/42" Rail for 2 doors kit less 20" wide door4ft/48" Rail for 2 doors kit less 23" wide door4.3ft/52" Rail for 2 doors kit less 25" wide door5ft/60" Rail for 2 doors kit less 29" wide door5.5ft/68" Rail for 2 doors kit less 32" wide door6ft/72" Rail for 2 doors kit less 35" wide door6.6ft/80" Rail for 2 doors kit less 39" wide door8ft/96" Rail for 2 doors kit less 47" wide door 4ft/48" Rail for 4 doors kit fit less 11.5" wide door, use six bifold hinges to connect four 11.5" doors.4ft/48" Rail for 4 doors kit less 11.5" wide door4.3ft/52" Rail for 4 doors kit less 12.5" wide door5ft/60" Rail for 4 doors kit less 14.5" wide door5.5ft/68" Rail for 4 doors kit less 16" wide door6ft/72" Rail for 4 doors kit less 17.5" wide door6.6ft/80" Rail for 4 doors kit less 19" wide door7ft/84" Rail for 4 doors kit less 20.5" wide door7.5ft/88" Rail for 4 doors kit less 21.5" wide door8ft/96" Rail for 4 doors kit less 23.5" wide door for 2 doors for 4 doors