Extensive Collection: This set includes 150 blue syringe tip caps, each featuring a 4 mm hole width, catering to a variety of uses from crafts to industrial applications. Ideal for handling glues, paints, adhesives, and conformal coatings, these caps you're well-equipped for any project. and Safe Material: Constructed from high-quality plastic, these syringe tip caps boast excellent toughness and reusability. They offer a tight seal and snug fit, reducing the risk of leakage. Their durability makes them suitable for repeated use in various professional and DIY projects. Universal Compatibility: Designed to fit a wide range of syringes, including brass, plastic, and stainless steel, these caps are perfect for daily use in both medical and non-medical settings. They a secure fit, enhancing the functionality of your dispensing bottles and syringes. Innovative Thread Design: Featuring a thread design, these syringe tip caps provide a secure connection that prevents dripping and detachment. The design not only enhances the seal but also allows for easy removal, even when dealing with sticky or viscous substances. User-Friendly: These syringe tip caps are designed for ease of use. They can be easily attached and removed from syringes, even when filled with sticky materials like glue. This makes them an essential tool for efficient and mess-free dispensing in labs, workshops, and craft environments. Color: Blue Material: plastic Package Contents: 150*lid 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.