Metal round pan. Size of a regular pizza pan. Hole in the middle is about the size of a coffee can. What is it for? : r/whatisthisthing
4'-10' Anodized Aluminum Deep Round Cake Pan Baking Mold with Detachable Hollow in Center Cakes - China Hollow Cake Mold and 4-14 Inch Aluminium Cake Mold price | Made-in-China.com