1. Speed up the growth of plant 2. Soi Heating or Seedling Heating 3. Different Sizes and Plug are available Specification: 4m(2m heated); 6m(4m heated);8m(6m heated);12m(10m heated);16m(14m heated);20m(18m heated);24m(22m heated);32m(30m heated) The Gro Quick Electric Heating Cable can be designed with thermostat or not. Different Sizes and Plugs are avalible! CE and RoHs approval.