Grade F cut 3.5cm diameter

Competitive Equivalents:

Whatman: n/a
Pall: n/a
Millipore: n/a
Ahlstrom: n/a

Grade F - Fine porosity, medium flow rate, with a 0.7µm size particle retention. Frequently used with Grade D to filter diluted aqueous solutions containing strong oxidizing, acidic, or alkaline components prior to laser spectroscopy. May also be used for TCLP analysis and collecting extremely fine precipitated proteins, including immunoglobulins. Binderless borosilicate glass microfiber. 
Competitive Equivalents:
Whatman: n/a 
Pall: n/a
Millipore: n/a 
Ahlstrom: n/a