Zeta sub-module / Bottom side module: Frame part is 30 mm thick mdf. The surface part is covered with walnut and beech tree. Special parquet pattern is used. Covers 18 mm mdf. Covers are cut with special curved CNC. The outer and inner parts of the covers are covered with walnut / beech. – Zeta large cabinet/ medium cabinet/ small cabinet/drawer module: 25 mm double face MDF is used. Covers 18 mm mdf. Covers are cut with special curved CNC. Zeta L module rack: 25 mm double face MDF is used. Zeta TV pad:18 mm double face MDF coating is used. The drawers were crushed by special CNC cut.The same material was used for the exterior and interior of the unit. So the natural appearance is achieved.