Ro-dan (Furnace Platform) Ro-otoshi (Furnace Drop-in) I believe it's made of copper because a magnet doesn't stick to it. Details other than the size are unknown. (It seems it was purchased in 1976 for 33,000 yen) Everything in the images is included. The box is tattered with age-related dirt, discoloration, stains, and writing. I will wrap this box in bubble wrap for shipping. Please ask specific questions. I do not understand specialized terms used in the tea ceremony. I will ignore standard Mercari comments and the price reduction button. Instant purchase is welcome without a comment. I will prioritize the first person to purchase, even if there are comments in progress.