These Blackout Humidity Domes are fully functional but do not meet our usual quality standards. The exterior features streak marks and visible imperfections; however, these cosmetic flaws do not impact their performance. Enjoy these discounted, below-standard humidity domes while supplies last! Heavy Duty Blackout Humidity Dome by Bootstrap Farmer. Designed for 1020 trays. Regulate the growing conditions for your seedlings, cut down on water, and maximize your microgreens crops. Made from recycled plastic. Includes adjustable humidity vents.