I don't know the details. It's new and unused, but it seems to be old. The box is damaged. I think it would be good as a cutting board for cutting sashimi or meat. I will ship it via post. If it doesn't fit in the post, I will take it out of the box and repackage it. I will try to send the box as well. The following is a Google search query: This image is a package for the "Defrost-kun SI" defrosting plate, which quickly and deliciously defrosts frozen food. It is said to defrost about 3 to 5 times faster than natural defrosting, without using electricity or gas. Because it doesn't apply heat, it can preserve the original taste of the food. It is explained that it can defrost even frozen tuna. Manufactured and sold by CEIKO Co., Ltd. A convenient cooking tool for quickly and deliciously defrosting frozen food. - Brand: EIKO - Product Name: Defrost-kun S1 - Function: Quickly defrost frozen food - Features: Retains flavor without losing heat - How to use: No water needed, no gas needed - Size: Approximately 30cm x 20cm Thank you for viewing.