Material: plastic material, safe and non-toxic. Size: Diameter: 3.5CM, total height 6 CM. Simple and easy: Just inject fertilizer directly into the plant soil of the bonsai. Then water the plants, and the fertilizer will dissolve the nutrients into the plants, saving fertilizer and preventing it from being eaten by other small animals. DURABLE AND REUSABLE: The bonsai fertilizer box is durable and can be reused many times, allowing you to take care of more plants with ease and worry-free. Suitable for bonsai, flowers, orchids and small plants. Utilities: A set of 44, ideal for potted plants, home plants, balcony plants, hanging baskets, outdoor gardens Ideal for those who like to grow plants at home.