This hemacytometer/cell counter is useful for counting very small plankton. The counting chamber features Neubauer--improved, double net ruling, dark-lined and without clamps. Each set contains the following: one counting chamber, two coverslips, two diluting pipettes, and two silicone rubber tubing pieces that have mouth piece attachments. The tubing is approximately 16 mm long. The hemacytometer is contained in a plastic case for easy transport.