Jump Start Seedling Heat Mat 8.875x19.5 17WProduct Details Jump Start Heat Mats are engineered for performance and durability. The strong heating wire and thick multi layer construction offer uniform heating and the ability to withstand rugged greenhouse environments. Features: Increases success of seedlings and cuttings Warms root area 10 20F over ambient temperature to improve germination Light, watering, and planting information on mat Waterproof construction 6 foot power cord UL listed 50%