BLAUBRAND®. Double ruling. Without snap-on clips. Cell depth 0.5 mm. The square area of 100 mm2 is subdivided into 40 rectangles with an area of 0.25 x 10 = 2.5 mm2 each. This chamber is commonly used for counting cells in the cerebrospinal fluid, or for counting nematodes. CE-marked according to IVD-Directive 98/79 EC.