10 Pack 120 Cell Mini Greenhouse for Plants Seedling Tray Indoor Nursery Planting Box with Sturdy Lid and Ventilation 0.8mm Thick Material: Compared with other 0.5mm thick plastic materials, our 0.5mm thick trays are thicker. Seeds use 0.8mm PVC material to be reusable, durable and not easy to break. (Note: Please avoid prolonged exposure to temperatures above 48°C) Unique Design: The adjustable window allows you to adjust the humidity inside from 50 to 100% to suit your needs. Clear walking seeds allow you to keep an eye on growth. Drainage holes at the bottom for better drainage. So you have full control over the growth process. Perfect Size for Starting Seeds: Each cell measures 3.7 x 3.7 x 5.5cm, 72 cells in total, and is suitable for small seeds such as flowers, vegetables, fruits, tobacco and other plants. The mini greenhouse is suitable for balconies, terraces and windowsills. Compatible with Heat Mat Plant Light: Can be used for a longer period of time in the lower temperature