Exclusive dot grid pattern does not enhance or inhibit colony growth Certified for use in the Membrane Filter (MF) Technique as described in Standard Methods for the Examination of Water and Wastewater, current edition Sharp contrast between black membrane and white grid line provides guidance while viewing and counting Available nonsterile or in individual gammairradiated packs (Spacks) for critical applications. Metricel black PES membrane disc filters provide excellent contrast for counting opaque colonies in microbiology labs.
