3- Kiln Dried Salvaged White Oak Wall/Book Shelves/Lumber Pack 32850Wood Type : Oak Front Side Tapers : Taper in Thickness leaving Unsurfaced Areas on Slab on Front Side up to 1 16" Deep x 1" Wide x 9 1 2" Long, and on Back Side up to 1 8" Deep x 5 1 2" Wide x 41" Long Cracks : Cracks Splits up to 1 16" Wide x 8" Long; Some Cracks Splits go Through Full Thickness of Boards Inclusions & Voids : Rustic Inclusions Voids up to 1 2 Deep x 1 Wide x 3 1 2 Long Bow : Up to 1 16 Cup : Up to 1 16 Twist : Up to 1 16 Sticker