Seedling Heat Mat Plant Seed Starter Pad Greenhouse Hydroponic Germinate 48"x20" RELIABLE RESULTS: VIVOSUN's professional heat mat maintains temperatures in the sweet spot of around 10℉-20℉ above ambient air temperature - perfect for seed starting and cutting propagation!BUILT TO LAST: Supple, flexible and ultra-durable, VIVOSUN goes beyond stringent MET standards, with a fortified connection between mat and power cord, water-resistance that enables safe scrubbing and a 1-year .STABLE, UNIFORM HEAT: VIVOSUN's strengthened Alloy Nikrothal heating wire and extra layer of insulating PET film ensure this durable mat never scorches your roots and produces lots of revitalizing dew when used with a humidity dome.BEST SAVINGS IN THE MARKET: This 10" x 20.75" mat is perfect for standard 1020 trays and slightly larger than comparable mats on the market; it also runs on only 18 Watts to help you save on electricity.STORAGE: Delivered in a high-quality, reusable storage bag, the mat flattens out when heating up and can also be rolled back up for easy storage.Notes:-For use indoors only.-For extra effectiveness (and especially in cold environments) add a towel or other insulating fabric under the mat to ensure all the heat is directed upwards. -A humidity dome is recommended to more accurately control moisture levels for seedlings.-A thermometer controller is recommended for more precise temperature regulation.Specs:-Materials: PVC, Alloy Nikrothal wire and PET film-Electrical Specs: 18 Watts, 120 VoltsPackage Contains: -1 x Heating Mat-1 x Storage Bag