Economy Rimmed Borosilicate Test Tubes - 18 x 150 mm, Pack of 100These economy rimmed borosilicate test tubes are an affordable solution for large scale experiments and classroom settings. Despite their affordability, they maintain high quality for durability and resistance to heat and chemicals, making them suitable for everyday use. How this product may be used: Conduct chemistry experiments in bulk for class demonstrations. Mix and heat substances for analysis. Use in biology labs for storing solutions and