Mondi Propagation DomeA professional propagation dome for starting seeds or cuttings. Designed to provide more cubic volume for your growing plants. Constructed from heavy duty, high grade plastic to maximize light penetration and stand up to repeated use. Perfectly fitted for standard 10 x 20 trays, to create tight seal and reduce moisture loss. HGC726140 and HGC726135 are temperature and humidity controlled by two adjustable vents.