Hydrofarm Windowsill Heat Mat 3" X 20" 7.3W 120V

This windowsill heat mat is perfect for veteran growers, beginners, and children too. It is the perfect size for small growing spaces, and improves germination by warming the root area 10-20F over ambient temperature. By warming the roots, you increase your growing success, as this mat will maintain a controlled temperature all season long. UL listed. Power cord included. 120 volt.