Level 2.1 Plant Propagation Cloning Kit: Humidity Dome, Tray and Inserts and Grow Plugs! 15" x 9" x 8" This DWC (deep water culture) Kit includes: 24 Rapid Rooter Grow Plugs, Humidity Dome, Trays and (2) Inserts (with holes for water circulation) 24 Sites and 15" wide x 9 1/2" deep x 8" high. Because of the smaller footprint, you will use less water and nutrients than when using the typical 10 x 20" models. Save money!! 8" of height so there is plenty of room for your clones to grow! The humidity dome also features adjustable vents so you can easily control the humidity of your cuttings. Made from quality plastic, not the thickest but the price is right and they are still durable and long lived. Also available in Level 2 and 3 Kits with Grow Plugs, Airpump, Airstone, instructions and more! See GrowboxUSA.com for more details.