PM2.5 Activated Carbon Filter Replaceable 5 Layers Protective Filters Insert for Cotton Face Mask (10 Pieces) AERIPULSE and there are precise grid

and there are precise grid lines on the back for easy measuring and cutting

suitable for long-term use without worrying about fading or scratching

1 1/3 inch Rod diameter makes it strong enough for light duty work gardening work without bending

so don't need to worry about harming your hand

PM2.5 Activated Carbon Filter Replaceable 5 Layers Protective Filters Insert for Cotton Face Mask (10 Pieces) AERIPULSE and there are precise gridAbout this item Made of 5 Layer Activated Carbon Filer, Non Woven + Melt Blown Cotton + Activated Carbon. Package Include 5 packs (10 pieces) Activated Carbon Filter for replacement. Filter size approx. 12. 1 x 8 cm 4. 76 x 3. 15 inches. Compatible with most adult masks, easy to insert or replace the original one with no problem. Face Mask Filters Reduce dust, pollution, pollen, smog, vehicle exhaust, sandy air, passive smoking. UTRIPSUNEW filter is