Similar to storage flasks, but cylindrical in shape.

• Equipped with either a 0 to 4 mm or 0 to 8 mm Chem-Vac™ Chem-Cap® valve, depending on size
• For round bottom storage flasks

The 25 and 50 ml sizes have a 0 to 4 mm Chem-Vac™ Chem-Cap® valve, while the 100 and 350 ml sizes have a 0 to 8mm valve size.