These disposable Corning® Spinner Flask Aseptic Transfer Caps will both reduce contamination and enhance the productivity of your cell culture operations when adding or removing medium and cells. Aseptic Transfer Caps are sterile (10?6 SAL), individually double bagged and fit the side arms on 1L Corning® Disposable Spinner Flasks (Cat. No. 3561). These disposable Corning® Spinner Flask Aseptic Transfer Caps will both reduce contamination and enhance the productivity of your cell culture operations when adding or removing medium and cells. Aseptic Transfer Caps are sterile (10?6 SAL), individually double bagged and fit the side arms on 1L Corning® Disposable Spinner Flasks (Cat. No. 3561).