A professional propagation dome for starting seeds or cuttings. Temperature and humidity controlled by two adjustable vents for better growing results. 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 a tight seal and reduce moisture loss. Deep, continuous channels and level fit wide ridges prevent water pooling and provide better stability for propagation media. Super reinforced sides and lip with thick plastic and UV protection for durability and long life. Professionally engineered tray-ends add extra strength, making them easier to carry and move. Easy to nest and separate trays.