Click to expand Tap to zoom EM-Tec 20nm silicon nitride membrane, 0.25 x 0.25mm window, 200µm frame SKU AU-23-202025-10 Original price $434.81 - Original price $434.81 Original price $434.81 $434.81 - $434.81 Current price $434.81 | / Choose a variant 10 - $434.81 Units per package: 10 10 Quantity Add to cart