PM2.5 Filters (2pk) 5-Layer Disposable 2.5 Micro Active Carbon Filter

**This item is sold as an add-on item only. Minimum 10 units can be purchased as a stand-alone order** PM2.5 Filters (Packaged with 2pcs) 5-LAYER NON-WOVEN FILTRATION MATERIAL (WITH ACTIVE CARBON LAYER) Material Specifications:

• 1x activated carbon
• 2x non-woven clothes
• 2x meltblown papers.

Filter size: Adults 4.5" x 3.2" The 2.5 in PM2.5 refers to the diameter size of particles in micrometers. The symbol for micrometers also known as microns is µm and is also described in decimals as 0.001 millimeters. (As reference the diameter of the human hair is 0.1 millimetres) Size comparison diagram shown below from the Environmental Protection Agency Inhaling 2.5mircons particles transferred and carried through air will aggravate breathing airways, Particles this size can penetrate deep in to the lung and into the blood stream from that point. It is recommended to change your filter twice a week if filter is used daily. DISCLAIMER The use of a PM2.5 filters without a fully sealed holding apparatus will not render the fill effectiveness of this filter.