The complete set includes one counting chamber, two 0. 5mm cover glasses, one red cell pipette, one white blood cell pipette, tubing, mouthpieces and carrying case. A counting chamber is a precision measuring instrument made of special optical glass. It is used to count cells or other particles in suspensions under a microscope. Counting chambers are mainly used for blood analysis (counting leucocytes, erythrocytes and thrombocytes) and to count cells of liquor. Counting chambers are also used, however, to count bacteria and fungus spores. Usage/Application: Laboratory Operation Mode: Manual Differential Type: 3-Part Number Of Chambers: 1 Number Of Parameters: Standard.