The G2010 slot grid has an overall thickness of ~50 microns. The grid type number corresponds to the overall slot size in mm eg. G2010 = 2x1mm slot. Molybdenum grids are especially useful in ion milling applications because of its resistance to etching.
The GT2000 grid represents the finest mesh grid that is currently available. It is manufactured using modern electron beam lithography techniques. It has found use in applications as diverse as vitreous ice (noncrystalline ice) specimen techniques to x-ray calibration.