HUMIDITY CONTROL LID WITH AIR VENTS: Our nursery box is designed with adjustable circular vents, which is easy to maintain the humidity and warmth required for seedlings to germinate The green-lined tray has a raised area at the bottom to keep the growing cell tray well drained and allow the bottom to be watered. STURDY MATERIALS & REUSABLE: The seedling tray is made of durable lightweight plastic material, durable and not fragile, thickened bottom material, can withstand pressure, will not lose soil or absorb too much water, effectively nurturing seeds GOOD OVSERVE for EACH PLANTS GROWTH: The seedling tray is used to raise seedlings, which is convenient for centralized management. The transparent tray is convenient for observing the plants and can keep warm and moisturize, and can be stacked together to save space when not in use. KEEP SEEDS GROW HEALTHY: Seeds need a suitable space to increase their absorption of water and nutrients. There are drainage holes at the bottom of each cell for proper drainage to reduce root supersaturation and help improve the survival rate of seeds. Colour:green+white+black Material:plastic Size:19x14.5x11.5cm Package Contents: 3 x Green seedling box 3 x white seedling box 3 x black seedling box Only the above package content, other products are not included. Note: Light reflection 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.