This rapid and economical two step staining technique for acid fast organisms saves time and money and takes only 2 minutes. Easier to perform than traditional methods since the permanganate step is omitted. A new counterstain quenches fluorescence of all non-acid fast organisms and debris. Gives a cleaner field of view. It is just as sensitive as other Auramine Stains. The set comes in two 250ml bottles or economical liter size.