20 nm Search× Default sorting Sort by popularity Sort by average rating Sort by latest Sort by price: low to high Sort by price: high to low Germanium-Coated Silicon Nitride Grids $375.00 TEM Silicon Dioxide Grids – 3×3 Windows $200.00 – $240.00 TEM Silicon Nitride Grids – 3×3 Windows $180.00 – $375.00 TEM Silicon Nitride Grids – Single Window $180.00 – $375.00