Manufactured according to DIN 12 847, including 2 haemacytometer cover glasses. The ruling is rectangular, covering an area of 5 mm². The large rectangles measure 0.25 x 0.20 = 0.05 mm². They are each subdivided into 20 mini squares with an area of 0.0025 mm².This chamber is commonly used for counting cells in the cerebro-spinal fluid, or for counting nematodes. BLAUBRAND® quality Outstanding measurement precision 100%  certified quality Manufactured according to DIN 12 847, including 2 haemacytometer cover glasses. The ruling is rectangular, covering an area of 5 mm². The large rectangles measure 0.25 x 0.20 = 0.05 mm². They are each subdivided into 20 mini squares with an area of 0.0025 mm².This chamber is commonly used for counting cells in the cerebro-spinal fluid, or for counting nematodes. BLAUBRAND® quality Outstanding measurement precision 100%  certified quality