PES Membrane filter,0. 22 um,13mm,200pcs/pack MLPES250 22 PES Membrane filter,0. 22 um,25mm,100pcs/pack MLPES470 22 PES Membrane filter,0.22um,47mm,100pcs/pack MLPES900 22 PES Membrane filter,0. 22 um,90mm,50pcs/pack. MLPES1420 22 PES Membrane filter,0.22um,142mm,25pcs/pack MLPES2930 22 PES Membrane filter,0. 22 um,293mm,25pcs/pack