This is "rantai-shikki," lacquerware made by coating bamboo baskets, tableware, and other items woven from bamboo with lacquer. I've been using a round tray for a long time, and it's light and durable. It's a traditional craft. This is a rectangular tray. The size is 39.5 x 27.5 cm, and the height of the rim is 3.2 cm. It has a beautiful sheen even after years of use. As it is lacquered, it cannot be used in a dishwasher or with a scrubbing brush, but it can be washed with a sponge if it gets dirty. (I also use dish soap, and it's fine.) I'm selling it because I don't use the large tray. It's completely unused and comes in a box, but the box is old and not in good condition.