The M2 is patented, two-sided sampling cassette for easier and more efficient use in the field and in the laboratory. This is the first cassette to proved sampling options to field personnel. Each cassette can be used to:
Collect two different samples
Collect two identical samples concurrently
Collect one sample while using the other side as control

The M2 cassette is also the very first of its kind for laboratory personnel. It provides one-time preparation for two samples, pre-printed traverse marks on the collection side for standardized counting, and side-by-side comparison of samples under the microscope