(4) Hydroponic 19009 107W Seed Start Seedling Propagation Heat Mats 48 x 20.75" under metal Constructed from high quality injection molded ABS Color:Cyberspace Constructed from high quality injection molded ABS When ice builds up Use of a propagation dome on the tray will help maintain warmth & humidity and will warm the root area 10 20°F over ambient temperature to improve germination
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