met certified 2 pack seedling heat mat, seedfactor waterproof durable germination station heat mat, warm hydroponic heating pad for indoor home gardening seed starter(10" x 20") seedfactor nurture your seedlings by ensuring they have a warm area for root growth and germination. <br>this seeding heat mat speeds up the transplanting process by keeping the soil between 70°fand 85°f. <br>intended for indoor use only, this product is waterproof and easy to clean to make storage a breeze. <br>available in small medium and large sizes and carries an met safety certification.