Placed in your seed compost, it is the essential accessory for the proper germination of your seeds requiring heat (approximately 22-25°C). Water-repellent, double insulated and acid-resistant. 3.5 m electrical resistance (2 m of electric cable + 1.5 m of heating), 14.5 watts. Warning: the resistance must not directly touch the walls of your terrine or greenhouse. Place your resistance between two layers of seed compost to avoid any risk of overheating.