Wide compatibility with 3ml ampoules and vials, suitable for various media including reagents, model paints, cosmetic liquids, and pharmaceuticals. Convenient one-click installation and one-handed opening, designed for frequent use and easy operation. Made from high-quality, chemically stable materials that are - and withstand high-temperature cleaning. Professional leak-proof design providing double protection against moisture and contaminants, ensuring the integrity of sensitive liquids. Reusable and easy to clean, maintaining excellent sealing and hygienic performance over long-term use. This product is designed to meet the diverse needs of laboratory research, dispensing, DIY crafts, and home storage. Its user-friendly features ideal for frequent handling, while the materials and reliability. The leak-proof design minimizes waste and protects valuable contents, making it a practical choice for various applications. Color: As Shown Material: Silicone Package Contents: 24*Insulin vial cap(Color is random) 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.