Diyhd 8ft 4 door Bypass Sliding Barn Door Hardware Track Black Bypass Barn Kit (8ft-basic roller kit) Hardware Only,Not including door panel Material:Steel,Color:Black;Suitable for door thickness 40-45mm;2 roller can bar max weight 90kgs Pre-drilled 16" apart holes on track Package's including:Roller:8pcs Stopper:8pcs Sliding track:2pcs*8ft Track&wall connector:12pcs Bypass connector:6 pairs Anti-pad:8pcs Floor guide:4pcs