This is a Shimano cooler box accessory, the cooler anti-slip rubber type B. NA-G01Y Currently out of stock in various places, making it a hard-to-find item. This product protects the cooler box from the ground and, as the name suggests, acts as a rubber anti-slip, making it an essential item. It is a new, unopened item, and I would like someone who needs it to use it, as I will not be using it myself. It's a hard-to-find item, so how about taking this opportunity? Thank you for your understanding and purchase.