mervplus merv 11 pleated filter 4 aprilaire generic Size:16" x 28" x 4" The humidifier pad is made

The humidifier pad is made of expanded aluminum

suitable for residential and light commercial

Rust resistant

Wraps around outside of main HEPA cylinder

Insert the filter with the black sealing gasket on the left

mervplus merv 11 pleated filter 4 aprilaire generic Size:16" x 28" x 4" The humidifier pad is madeHigh Capacity Pleated Air Filter constructed utilizing synthetic, electrostatically charged MERV 11 performance at a very low, energy saving pressure drop setting the standard for performance. Mechanical media does not rely on a static charge to achieve efficiency rating High Efficiency cleaner air to breath Heavy duty, 100% reclaimed fiber, beverage board frame with expanded metal backing providing exceptional strength High Capacity model: more