The Hydro Crunch 7 inch Tall Clear Dome with Heavy Duty Flat Tray, 72 Cell Insert and Heat Mat with Hot & Cold Digital Thermostat comes with everything needed to begin plant propagation. Use included compartmental tray to start 72 separated plants using your favorite growing mix. The heat mat works best when on a flat, dry surface and plugged the cord into any 120-Volt outlet. Included seedling tray is to be placed directly on top of the heated mat. For best germination results, place the tall propagation dome over the tray and keep it under a T5 fluorescent lighting (approximately 300 ft. to 800 ft. candles). Direct sunlight or high HID lights may be too intense for seedlings and as a general guideline, seedling and clones grow best with temperatures of 70\u00b0- 80\u00b0 and humidity range of 50%-60%. Please be sure to research your particular plant as temperature and humidity requirements vary for different species and hybrids. Kit includes: Hydro Crunch 7 inch Tall Clear Dome, 10\u201dx20\u201d Heavy Duty Flat Tray, 72 Cell Insert, Heat Mat and Digital Outlet Thermostat with Heating and Cooling Mode for temperature control.<\/br><\/br> \u2022 Kit includes: Hydro Crunch 7 inch Tall Clear Dome, 10\u201dx20\u201d Heavy Duty Flat Tray, 72 Cell Insert, Heat Mat and Digital Outlet Thermostat with Heating and Cooling Mode<\/br> \u2022 Heavy duty flats without holes are perfect for the propagation of plants<\/br> \u2022 Heat mat warms root zone 10\u00b0- 20\u00b0 above room temperature<\/br> \u2022 Speeds germination and encourages strong root growth<\/br> \u2022 Fits snugly under standard size seed tray<\/br> \u2022 High quality, water resistant construction<\/br> \u2022 Tall propagation domes create a humid and warm environment for general propagation, clones and seed germination<\/br> \u2022 72 cell inserts keep seedlings optimally distanced apart for best growth<\/br> \u2022 Thermostat can be used to regulate the temperature range between 40\u00b0F and 108\u00b0F<\/p>\n