Microyn Improved Neubauer Hemocytometer, Blood Counting Chamber, Cell Counting Chamber High Light Transmission for Easy Visibility Two separate cell counting chambers Improved and brightly illuminated grid lines (For better visibility of the grid lines, please choose the one with bright line) No Cover Slips Included. Please purchase Hemocytometer cover glass separately, or use common cover glass with the unit. Cover slips precisely held 0.1mm above counting chamber