This is an elastomer kamaboko-shaped cutting board. If you look at the first image, there is a faint mark about 5mm long, as if drawn with a green colored pencil, on the upper left side. It did not come off with bleach. It is faint. Dishwasher safe Heat resistant up to 130 degrees Celsius ★I am currently listing items that can be offered as a bonus. Please take a look if you like.