Nalgene™ Vented Closures for Sterile Disposable Erlenmeyer Flasks
By NalgeVented Closures provide sterile gas exchange for shaker and suspension cell culture. Hydrophobic 0.2µm PTFE membrane allows sterile air exchange without unscrewing the closure and is heat welded into place for effective sealing. Made of blue HDPE for easy identification. Use with Nalgene™ Sterile Disposable Flasks (Cat. Nos. 4112 and 4113).