This clear borosilicate glass vial features a 0.060in thin septum. The septum is easy to puncture with syringe needles and is ultrasonically bonded to a size 24-414 Polypropylene closure without the use of adhesives. Choose from clear or amber vials available in 100, 200 or 300 series. I-Chem certified 200 and 300 series vials meet the EPA?s Performance-Based Specifications for volatile organic analysis and EPA drinking water specifications. All vials are TOC certified. Capacity: 40mL. Closure Size: 24-414. Series: 300. Closure Material: Polypropylene. I-Chem Brand #: T336-0040.