Cellometer plastic disposable cell counting chamber features an improved neubauer counting grid on plastic that is mounted onto a standard 25x75mm plastic slide. The dual counting chamber has a sample introduction port, counting grid and air evacuation port. This is deal for laboratories working with infectious samples. Duplicate samples may be counted or control/unknown samples may be counted on the same slide. No cover-slip is required for the cellometer thus avoiding counting errors. Packed 25 per case