These chambesr are great low-cost apparatus for enumerating zooplankton micro-crustacea & benthos. This kit includes both 6 ml & Larger 39 ml sizes, & holds a large volume of sample. The shape and configuration of the , etched groove (1/2" deep and 3/8" thick & 1/2" deep and 3/8" thick) help locate specific areas on the chamber.  Each are 3.5" x 4.5" in size, slips easily under a dissecting microscope. Featuring straight sides so you don't have to focus up and down. Rounded corner edges prevent specimens from catching.

This item is priced & designed to be disposible, expect about a month of use (depending on usage). Buy several for meduim to larger studies.