Material: Hinoki cypress (naturally dried Nishikawa wood) Dimensions: Width 23.5cm x Depth 10.5cm x Thickness 2cm ☆ Naturally dried Hinoki cypress contains a high amount of antibacterial and antifungal components. ☆ The usable surfaces (front and back) are unpainted. ☆ The end grains, which easily absorb water and become discolored, are coated with a food sanitation law-compliant penetrating urethane oil (Kikogame Ace). ☆ After use, wash and wipe off the water, then dry in a place away from direct sunlight. ☆ Please be aware that kitchen bleach may react with the wood components and cause blackening. ☆ As it is made of wood, avoid soaking it in water for extended periods. ☆ Please be aware that drying in a dishwasher may cause warping or cracking due to high temperatures.