4- Salvaged Red Oak Lumber Boards/Wall/Book Shelf Wood Slabs 33130Wood Type : Oak Front Side Tapers : Taper in Thickness leaving Unsurfaced Areas on Slab on Front Side up to 1 16" Deep x 2" Wide x 36" Long, and on Back Side up to 1 16" Deep x 2 1 2" Wide x 11 1 2" Long Cracks : Very Small Hairline Cracks Checks Inclusions & Voids : Rustic Inclusions Voids up to 1 1 2 Wide x 3 1 2 Long, Some go Through Full Thickness of Boards Bow : Up to 1 16 Cup : Up to 1 16 Twist : Up to 1 16 Worm Holes Rot : Small Worm Holes