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 & is ideal for laboratories working with infectious samples. duplicate samples may be counted, or control/unknown samples may be counted on the same slide. no coverslip is required for the cellometer thus avoiding counting errors. pack 25/per cs