72 in. x 80 in. Hollow Core 1-Panel White MDF Composite Double Bi-Fold Barn Doors with Sliding B2763P491034Each set includes: 1 x sliding bi fold door hardware kit, track length 75 in.; 2 x 36 in. x 80 in. bi fold door each door leaf 18 in. x 80 in. Raised 1 panel bi fold door is constructed of high quality MDF, a composite material milled in a 1 piece frame to withstand changes in heat and humidity better than solid wood 2 sides design, the design is on both sides of the door Door comes fully finished through our fade resistant, multi step paint and seal