(1) 500 µm 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 Grid $375.00 TEM Aperture Grid – Single Opening $140.00 TEM Silicon Nitride Grid – Single Window $180.00 – $375.00 X-Ray Silicon Dioxide Window – Single Window X-Ray Silicon Nitride Window – Single Window $375.00 – $500.00