Counting chamber Neubauer, large, square centre, 16 group squares,, 1 unit(s)Counting chamber Neubauer, large, square centre, 16 group squares,, with 2 spring clamps Material: glass. Double counting grid. Counting grid with nine large squares. The smallest square in the centre is split into 16 group squares and these in turn are split into 16 small squares. Large square: 1 mm2 Group square: 0. 04 mm2 Small square: 0. 0025 mm2 The counting grid appears under the microscope as a grid of dark lines. Spring clips securely fix the