Ideal for seed germination, early seedling growth, and cuttings propagation, the SunDome 7.5 inch humidity dome allows the grower to adjust the humidity levels to best suit the stage of growth using adjustable vents on top and sides. The clear, high-quality BPA-free food grade plastic makes it easy to see the plants and observe their growth. It's standard size and compatible 10in x 20in trays as well as all other products of that size. | SunPack 7.5" Multi Vented Humidity Dome 2 inch in Clear | Size 2"