Reusable 25ml Borosilicate Lab Tubes

Set includes 30 clear, flat-bottom glass test tubes, each sized at 20 mm outer diameter × 100 mm height (0.79 in × 3.9 in), with 25 ml nominal capacity. Made from borosilicate glass known for heat resistance and chemical inertness; walls are 1.1 mm thick, inner diameter 17–18 mm. Supplied with natural cork stoppers ensuring a tight, reusable seal. Safe for storing bath salts, liquid extracts, powdered supplements, candy, craft supplies, plant samples, or experimental reagents. Use cases span education, personal care formulation, home crafts, event styling, and small-batch product packaging.