ptfe membrane filter for power generation millex ptfe unlaminated membrane filters, 10.0 micron, 47mm, 50/pk - power generation hplc unlaminated ptfe membrane filter specifications performance by pore size pore size rating (µm) thickness (µm) air permeability 1 (l/min·cm² at 70mbar) clean water flow 2 (ml/min·cm² at 0.7bar) water entry pressure