Jump Start Windowsill & Heat Mat & Tray Kit, Includes Two 12 Cell Pellet Greenhouses That Allow You To Take Charge Of Your Seed Starts, Each Mini Greenhouse Features 12 Peat Pellets & A Vented Dome To Create The Perfect Environment For Your Plants, 3" x 20" Windowsill Heat Mat Fits Perfectly Underneath The 2 Greenhouses, Perfect Size For Small Growing Spaces, Heat Mat Improves Germination By Warming The Root Area 10-20 Degrees Fahrenheit Over Ambient Temperature, By Warming The Roots.
