The Super Sprouter Seedling Heat Mat will help you improve plant germination and increase seedling/cutting root production. This easy to use matt lays underneath your propagation trays, slightly warming them and providing ambient, ideal temperature for your sensitive cuttings and seedlings. Super Sprouter Seedling Heat Mat is excellent quality and can be attached to an optional thermostat for precise control. Warms rooting area approximately 10°F-20°F over ambient temperature to improve germination process. Proven to improve germination! Dimensions: 10” x 21”, includes 5 ft 120 volt power cord. One mat uses 20 watts. Thermostat sold seperatly. Part number 726702.