Cell culture dishes are designed for optional gas exchange. A vacuum gas plasma treatment permanently and consistently modifies the cell growth surface. Stacking rings allow for easier handling. Standard tissue culture surface is hydrophilic and contains a variety of negatively charged functional groups that support cell attachment and spreading. Gridded Tissue Culture Dish is 150mm diameter by 25mm height, with numbered grid of thirty-two, 20mm squares on bottom. Growth area: 151.9 sq. cm.