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.