Graduated Borosilicate Test Tubes - 16 x 150 mm, Pack of 100These 16 x 150 mm Graduated Borosilicate Test Tubes are an essential tool for any science lab, offering durability, precision, and safety in one design. Made from high quality borosilicate 3. 3 glass, they resist thermal shock and chemical corrosion, making them ideal for repeated use and safe for autoclaving. Their clear graduations every 0. 2 ml allow for accurate measurement and observation, particularly useful during titrations or sample