Wusthof Concrete Knife Block Thermo Beech 6 slot: 7258Wusthof Concrete Knife Block Thermo Beech 6 slot: 7258 Rectangular concrete casing with wooden insert made from thermo beech. Sealed concrete surface. Tiny air pockets in the surface are entirely intentional and prove that this is a natural cast product made from limestone, clay and sand. Storage of up to six knives (maximum blade length 23. 0 cm) and one honing steel. The 12mm walls are thin for concrete and, weighing in at 3,280g, the block is not