Economy Rimmed Borosilicate Test Tubes - 25 x 150 mm, Pack of 100This pack of 100 rimmed borosilicate test tubes (25 x 150mm) is a versatile and durable solution for conducting various experiments in the lab. Made to international standards, these test tubes are crafted from high quality borosilicate glass that resists heat and chemicals, making them perfect for repeated use in educational and professional laboratories. How the product may be used: Perform chemical reactions requiring secure rimmed test tubes. Use