Hydrofarm Seedling Heat Mat (20" x 48", 107 Watts)
$94.50This thin, waterproof mat raises temperature of rooting area when trays or pots are placed on top. Capable of raising temperatures approximately 20 degrees F above ambient temperature, this mat can help create a suitable germination environment for your seedlings. Includes 120 Volt AC power cord. 20" x 48". 107 Watts.