Corning 430320 50 mL Tube Top Vacuum Filter System, 0.22 µm Pore, Sterile, Q=12
These are the 0.22 µm Pore. This is my item N2210-N2270. Expiration is 5-27-2025. THese have a manufacture date of 5-27-2022. Minimizes unnecessary transfers by filtering directly into 50 mL centrifuge tube.