SunPad Pro 150 Watt Heat Mat Add-On, 21" X 60", Sunpack, Mfr#: SP10160

For large growing operations, get perfect seedling temps with the SunPad Pro. Uniformly increases roots zone temperature between 10-20 degrees (F) above ambient temperatures, for better germination and rooting. The add-on pads harness the Pro’s modular design, for over 500 square feet of coverage (requires one heat mat and four add-on mats).