Super Starter Seedling Heat Mat, 10" x 20.5"The 10" x 20. 5" Super Starter Seedling Heat Mat increases root zone temperatures 10 20F above ambient temperatures to improve seed germination and plant cutting success rates. This 120 volt unit is made of soft, highly durable waterproof materials, making it easy to fold and store. The mat features waterproof daisy chain capabilities and connects up to 50 units. It includes an integrated power cord and one year warranty. Operates at 0. 16 amps and 19