GE’s sterile Whatman MicroPlus-21 cellulose nitrate membrane filters are for microbiological quality control. The STL version is compatible with Membrane-Butler and other membrane filter dispensers. All MicroPlus-21 membrane filters are white with a high-contrast black grid (3.1 mm) Designed specifically for microbiological QC High mechanical strength and flow rate Tested for bubble point, bacterial retention, flow rate, recovery rate, and sterility Individually packaged for convenience and sterility Type STL provided in dispenser boxes with 100 numbered membrane filters for easy removal and secure handling using GE’s Membrane-Butler GE Healthcare’s Life Sciences business offers a range of Whatman cellulose nitrate membrane filters, including both sterile and non-sterile options in gridded and non-gridded formats. Here you can find the certificate: <a href="https://www.cytivalifesciences.com/en/de/support/qualitMeer tonenMinder tonen