PTFE Unlaminated Membrane Filters, 0.2 micron, 47mm, 50/Pk – PTU0 PTFE Unlaminated Membrane Filters, 0.2 micron, 47mm, 50/Pk Product code PTU024750 Acrodisc® Syringe Filters, 25 mm, Pall Laboratory | VWR Acrodisc® Syringe Filters, 25 mm, Pall Laboratory.