Black two-tiered bento box with a gold fish design, convenient with dividers. - Design: Black bento box with a gold fish design - Size: Two-tiered, with a lid on the upper tier Approximate dimensions: 11cm x 15.5cm x 8cm (height x width x depth) Weight: 300 grams - Dividers: Includes internal dividers to separate food items Thank you for viewing. I believe Rokuzaburo refers to Mr. Rokuzaburo Michiba. I'm not sure about the material, but it's a substantial bento box with a slightly heavy feel. Please understand that this item has been stored at home before purchasing. #RokuzaburoMichiba #LunchBox