- Set of 30 transparent plastic test tubes, 100 x 15 mm, each with an airtight screw cap - Made of high-quality PET, a safe, eco-friendly, durable, and reusable material - Caps ensure a perfect seal, preventing liquid leaks and air entry - Burr-free surface, easy to clean and maintain in optimal condition - Allow clear observation of substances and objects inside - Ideal for laboratory experiments, storage of seeds, sand, beads, spices, bath salts, pearls, and more - Recommended for use in laboratories, educational centers, crafts, and scientific projects