This is a 21cm cedar steamer (chūka seiro) from Teruho, a specialty store in Yokohama Chinatown. It has a sturdy construction, with metal fasteners for durability. Unlike a regular steamer, a natural material like cedar absorbs excess moisture, allowing the ingredients to retain their flavor without becoming soggy. Size (approx.) Body: Diameter 21cm x Height 7cm x Depth 4cm Lid: Diameter 21cm x Height 4cm