11 mm crimp top, wide neck opening design, allows easy filling, requires inserts with a diameter of 6 mm.

• Aluminum crimp closures provide a secure leak-resistant seal
• Aluminum seals must be applied with a crimping tool
• Spring promotes alignment and ensures insert seals against septa to help guard against evaporation loss

Wide opening vials feature 40% larger neck opening than standard opening vials, for easier access and reduced needle damage.