This is an old item. I have soaked it in baking soda and scrubbed it with a steel wool, but please understand in advance that there may be stubborn stains and minor scratches that cannot be removed. There are no noticeable major stains, scratches, or tears. I am not sure of the material, but it is not something purchased from a 100-yen shop. I believe it is stainless steel, but I am not certain. [Size (approximate)] Deep colander: Diameter 19cm, Height 10cm Flat colander: Diameter 21cm, Height 6cm