Provide an external heat source to help elevate your pet's body temperature with the Thrive Heating Mat for Hermit Crabs. Your hermit crab's heating pad should make his home cozy. Small size for hermit crabs and amphibians Hermit crab tank heater mat for terrariums up to 5.5 gallons Evenly distributes heat For side and under-tank mounting ETL Certified Includes: 1 Heating Mat Intended For: ldeal for Hermit Crabs, Frogs, Small Lizards and Snakes, Tarantulas Dimensions: 4 in x 5 in (101 x 12.7 cm