The iPower 2-Pack 4 by 7-Inch Reptile Heating Pad Terrarium Heater Under Tank Heat Mat is an improved design that increases overall heat transfer across the mat. The mat is made of new PTC heating material and insulation, and it reaches desired temperatures quickly. The 3M adhesive paper provides a strong stick to the contact area of the terrarium, so the mat stays in place while the animal is moving. The mat is perfect for use with reptile, lizard, amphibian, small animal, or plant terrariums. It is also perfect for germination, home brewing, or Kampuchea Tea.