3 mm filters for < 1 ml Sample Volume – Filtration Area 0.07 cm2 – Dead Volume 5 µl 13 mm filters for < 1-5 ml Sample Volume – Filtration Area 1.37 cm2 – Dead Volume 30 µl 25 mm filters for < 5-100 ml Sample Volume – Filtration Area 4.91 cm2 – Dead Volume 80 µl