Vented Humidity Dome, 7.5" Case Quantity is: 10Case Quantity is: 10 This is the only dome on the market with adjustable top and side vents to better control humidity and temperature. These domes fit directly onto the standard 10 x 20" cut kit trays to create a humid and warm environment ideal for cuttings and seed germination. Tall 7. 5" dome gives extra height for your taller cuttings. Adjustable vents allow for perfect humidity and temperature control.