A heating wrap that is stuck directly to the fermenter to increase heat by 5-20° F. This heat wrap distributes 32 watts of heat over an area of 2 square feet for a very gentle heat that is safe on glass, plastic, and steel. Use electrical tape (recommended) to adhere to your carboy, plastic fermenter, or even your conical! For ultimate control of your fermentation temperature, use in conjunction with a temperature controller such as the Inkbird ITC-308.