6-Pack Boiling Flasks with Cork Stoppers, 50mL, Borosilicate Glass

This pack of six 50mL narrow-neck Erlenmeyer flasks includes fitted bark cork stoppers (standard size #7, 15–21mm diameter, 25mm length). The flasks are made from lab-quality borosilicate glass with approximate graduations. These sealed flasks are suitable for holding and storing liquid or solid materials. The cork stoppers provide a snug, natural seal. The 6-pack is ideal for equipping classrooms with individual student flask sets for chemistry experiments and sample storage.