The Hydrofarm Seedling Heat Mat is a 20×9 inch heating mat designed for use in hydroponics setups. It is water-resistant and powered by a 120V outlet, consuming 17W of power. Made of durable plastic material, this heat mat is ideal for maintaining the optimal temperature for seedling growth, ensuring a successful transplant into larger pots or systems. Perfect for home or garden use, this black and green mat is a valuable tool for any hydroponicare hobbyist or professional.