The plant starting trays are made from silica gel material that is heat resistant up to 120°F, suitable for use with heating pads and grow lights, and durable enough for multiple reuses. Perfect size and convenient design — seed starting trays provide ample space for plants and act as a protective barrier for seedlings, helping shield them from wind, rain, and cold temperatures. Suitable for planting vegetables, fruits, flowers, and other seeds. Adjustable humidity and airflow — rotate the ventilation knob to control interior humidity between 50%–100% to support optimal seedling growth. The clear lid allows light transmission while retaining warmth and moisture, promoting successful germination—especially beneficial for seeds requiring high humidity and temperature. Clear cell tray — transparent cells make it easy to monitor soil moisture and determine when watering is needed, support a healthy growing environment, and allow visual inspection of root development to assess readiness for transplanting. Drainage holes help prevent over-saturation and improve seed viability. How to plant — fill each cell approximately two-thirds full with nutrient-rich soil, place seeds in the soil, cover lightly with additional soil, and water gently. Place the clear lid on top and adjust the ventilation knobs as needed during germination. Color: Black Material: Silica gel Package contents: 8 × plant starting trays Note: Color appearance may vary slightly due to screen settings and lighting conditions. Measurement tolerance: ±1–3 cm.