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The polyethylene disks are sized to fit part number TE-10-705 glass petri dishes with aluminum covers.
The disks are supplied non-sterile and must autoclaved at 121°C for 45 minutes prior to use. The disks absorb approximately 7mL of water and allow longer sample times when using a viable cascade impactor. Higher efficiencies are observed by using a filter placed on top of the porous disk. Tisch brandSF14652 MCE 90mm membrane filters are recommended.