Advantec MFS A045F047A, Membrane Filter with Pad, Sterile, Grid, 47 mm Diameter, 0.45 mm, Mixed Cellulose Esters, White (Pack of 100): Amazon.com: Industrial & Scientific
Advantec MFS 43301020 Model KP47U Vacuum 47 mm Size Filter Holder, Aseptic Unit, Funnel, Base, Cover and Receiver, Polysulfone: Amazon.com: Industrial & Scientific