Humidity Control- You can fully control the planting process of your Seed Starter Tray with dome. There is one air vent on the transparent dome,you can adjust the humidity and temperature to increase the seeds germinate rate. Our seed starting kit suitable for heat mat and plant light, even can be hydroponic.Keep an Eye on Your Plant Growth- The clear plastic trays and humidity dome of this propagation trays make it easy to observe your plants without interrupting the process.Drain Hole- With drain hole at bottom of each cell for proper drainage, reduce roots over saturating to increase the germination rate and survival rate of the seed. Each plant germination trays with 6 circle holes fits for 30mm peat pellets.Stackable & Easy Storage & Resuable-With our garden starter kit,you will have your own mini-greenhouse for seedling,plamting, convenient for centralized management of seeds, save time and improve efficiency.Made of new plastic material which is economical and reusable. suitable for plant cuttage, seedling.Material:plasticcolour:transparentPackage Contents:10 * seedling tray20 * plant labels1 * black pen2 * gardening toolsOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.