【Package Contents】Your package contains 36 capped test tubes and 36 Happy Lab Week stickers. The plastic test tubes with caps are approximately 45 ml each, measuring 1 inch × 5.5 inches / 25 × 140 mm. This quantity is sufficient for your use and sharing needs.【Size Details】These tubes with screw-top lids have a capacity of approximately 40ml (1.52 oz). The threaded design ensures they can be securely stored in any standard tube rack for easy organization and access.【High-quality material】These plastic test tubes with caps are made of high-quality plastic and have aluminum screw caps, making them durable and reusable.【Secure Seal】Designed with precision, these test tubes feature screw-on caps that form a reliable seal. This ensures your liquids, lab specimens, or small items like are safely protected from dust, moisture, and contamination. The user-friendly design also provides a comfortable grip for easy handling and secure shaking when needed.【Wide Application】Besides laboratory uses, these clear test tubes are versatile and can be used at birthday parties, wedding receptions, baby showers, or as part of holiday decorations. These capped clear test tubes are suitable for storing most small items, such as candies, seeds, spices, powders, jewelry beads, liquids, or other small items.