Easy to use - Simply inject fertilizer directly into the bonsai's plant soil. Then water the plants and fertilizer will dissolve the nutrients in the plants Covered design - The fertilizer boxes protect your plant's fertilizer from losing fertilizer caused by movement or wind blowing. The covered design prevents birds from stealing fertilizer. Practical tools - A set of 100, very affordable, can be used for a long time. It can be directly inserted into the ground, which is simple and convenient to use. Application - Suitable for potted plants, indoor plants, balcony plants, hanging baskets, outdoor gardens Ideal tool for people who like to grow plants at home. Quality materials - Made of high quality plastic, strong and durable. Fine workmanship and long life. We provide good customer service, please feel free to contact us if you have any questions. Specification: Material: Plastic Color: Black Size: 4*6cm Package includes: 100*box fertilizer Notice: The size is measured by hand, please allow a minor measurement error. Photo color may be slightly different from the actual product due to color display of different monitors.