13x100mm Glass Test Tubes with Screw Caps and Cardboard Rack, 3.3 Boro, Flat Bottom, 7ml Vol, Karter Scientific 227O8 (Pack of 25);

Karter Scientific is a registered trademark in United States of America. To maintain quality control, authorized permission is required in the resale of our products. These reusable glass flat bottom Test Tubes are made of 3.3 borosilicate glass to reduce pH changes and contaminants potentially leached from soda-lime glass. Black Phenolic Screw Tops are lined with teflon and fabricated from a special formula resistant to the effects of temperature and steam in autoclaving. This set comes with a 25 place Cardboard Rack