25x200mm Glass Test Tubes with Cork Stoppers and 35mm Cleaning Brush, 3.3 Boro, 70ml, Karter Scientific 212X12 (Pack of 10)

These reusable Karter Scientific glass round bottom Test Tubes are made of 3.3 borosilicate glass to reduce pH changes and contaminants potentially leached from soda-lime glass. Including Size 11 Cork Stoppers and Test Tube Cleaning Brush.