iPower Durable Waterproof Seedling Heat Mat 20" x 20" Warm Hydroponic Heating Pad MET Standard DURABILITY: Internal insulated wiring for enhanced safety. Heavy duty multi-layer construction. Mat Certified with MET (Tracking No. E114273) PROFESSIONAL RELIABILITY: Warms 10-20F above ambient room temperature. Provides constant temperature to improve vegetable, plant, herb, and flower seed germination VARIETY OF USES: Perfect for seeding, germination, home-brewing, and pet enclosures terrariums, such as those used in reptile, rodent and arachnid DIMENSIONS: 10"x 20.5", Watt: 17.5W; 20"x 20", Watt: 48W; 48"x 20", Watt: 100W; Length of Power Cord: 5.90ft QUALITY GUARANTEE: 1 Year Manufacturer Warranty