For counting thrombocytes or erythrocytes. For export outside EU only, chamber depth 0.1 mm.

Ruling:

• 9 large squares, surface area 1 mm² each = 9 mm²
• Each large square is divided into 16 groups of squares 0.2 x 0.2 mm
• Additionally there are small squares of a surface area of 0.0025 mm² each