Fluker s 20-Gallon Pet Habitat Metal Screen Cover 12 x24 is great for any terrarium to keep your reptile amphibian or arachnid enclosed to ensure safety and security. The screen covers are available in assorted sizes to fit any terrarium. Use our Screen Cover Clips with the cover to provide ultimate security. Made of durable metal this unique cover withstands high temperatures from heating devices. The metal mesh screen also increases the tank air circulation minimizing the unwanted growth of mold bacteria and other organisms in your tank.