Fluker's Ultra-Deluxe Premium Heat Mat is the perfect solution for keeping your cold-blooded friend comfortable and healthy, reducing risk of digestive problems or infection caused by inadequate heat. This mat's premium construction provides uniform, evenly distributed heat at a consistent, ideal 100°F temperature. And it works great under or on the side of your pet's terrarium (side mounting recommended for enclosures with no bottom ventilation and/or thick or heavy substrate).