Growsun 9" X 20" Seedling Heat Mat Hydroponic Heating Pad Growsun Hydroponic Heating Pad, 18 Wattage, for propagation High-quality PVC Material, 9"x20",Heatproof,Moisture-proof,ultrathin,The Outlet is Reinforced and Anticreeping on Structure Low Power Heat Mat for Plant Grow Seeding, Average Temperature:402,The Heat Transfer from Mat to Nursery Pots when They Contact Using for Plant Cultivation,Accelerated Growth and Improve the Survival Rate It is Suitable for Pregermination and Rooting of Herb,Flower ,Vegetable and so on