Ultimate humidity dome for highest propagation success rates.Perfect Fit system snugly fits standard 1020 trays.Provides maximum space for seeds, cuttings, and plants.Perfect 2-Finger Easy Vent ensures precise humidity control.Thick, heavy-duty, high-grade plastic maximizes light penetration.Experience The Mondi Advantage!Width: 11 inches (28.0 centimeters).Length: 21.5 inches (54.6 centimeters).Total height: 12 inches (30.5 centimeters).