Description Safe and durable teat tube are made of good material, more resistant to crack and break,and can easily grasp test tubes thanks to the perfect size. These teat tubes are great for scientific experiment, c an exercise children's hands-on ability, increase children's interest in learning and exploring knowledge. Features - Color: As Shown-Material:PS- Size: 10.00X1.50X1.50cm/3.93X0.59X0.59in-Note:Lid color is random- Great to store samples, and liquids, suitable for scientific experiment, and propagation. - Convenient storage. The test tubes are compact and lightweight, making it easy to store when not in use. - These test tubes feature with smooth wall and good transparency, low temperature resistant. - The sufficient quantity test tubes satisfy your various needs, and you can also share the extra amount with your friends. - This clear tube can be used in hospitals, prevention station, scientific research laboratory, etc. Packing list: 50 x test tubes with caps