Thank you for viewing. This is a homemade squid tray made by drilling drainage holes in an AKAO hard aluminum system bat small-small 50 to improve drainage. The burrs have been removed. By placing ice packs or ice on the bottom of a cooler box and then placing this tray on top, you can cool things efficiently. The external dimensions in actual use are 315 x 235 x 50mm, and when stacked in three tiers, the height is 150mm. This is a used item that has been used several times. Please check the product condition in the images. Because it is thicker than commercially available squid trays, it is also easy to use for cuttlefish, squid, and fish such as horse mackerel.