NEST Cover glass is a piece of very thin glass used to cover material on a microscope slide/cell culture plates of 6, 12 & 24 wells They are made up of high-quality, optically clear borosilicate glass and are ideal for specialty microscopy and imaging. They are consistent flatness and scratch-free. The NEST cover Glasses have 0.17mm thickness & various diameter depending on the cell culture plate used i.e. from 14mm to 25mm used for 24 Well & 6 well plate respectively