VEVOR Electrostatic Air Filter, 20x25x1 inch Washable & Reusable Aluminum AC/HVAC Furnace Filter, MERV 8 Long Lifetime, Home or Office (Actual Size: 19.75 x 24.65 x 0.82 in)

This filter has a very low efficiency, and the actual MERV1 should not be achieved. If your company wants to achieve MERV8, you need to upgrade the internal design and add MERV8-level efficiency filter cotton in the product.