EISCO 12pc 25mL Glass Test Tubes with Cork Stoppers, 18x150mm - Industrial Quality Borosilicate Glass & Premium Natural Cork - for Science Experiments, Plant Cuttings, Seeds, Beads, Spices

EISCO 12pc 25mL Glass Test Tubes with Cork Stoppers, 18x150mm - Industrial Quality Borosilicate Glass & Premium Natural Cork - for Science Experiments, Plant Cuttings, Seeds, Beads, Spices

• PACK OF 12 || Includes a 12 pack of 25mL glass tubes fitted with cork stoppers
• INDUSTRIAL QUALITY GLASS TEST TUBES || 25mL (0.84oz) capacity Test Tubes are made of industrial quality, heavy-duty borosilicate 3.3 glass. They measure 150mm (5.9") long and 18mm (0.7") in diameter, with a 1.2mm uniform wall thickness. Can withstand direct flame, high temperatures & thermal shocks
• PREMIUM SIZE #6 CORK STOPPERS || Corks are made of durable, natural bark material. The reliable construction will not crumble or break easily. Each size 6 stopper measures 24mm in length, a 13mm bottom diameter, and a 19mm top diameter
• TIGHT SEAL || Corks provide a tight fit into the mouth of tubes, but are still easy to insert and remove
• MULTIPLE USES || Designed for use in professional laboratories, these tubes with corks are also ideal for storing liquids, powders, seeds, beads, and more