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One pair (for the left and right side of the mask)
Highest Filtration efficiency – Removing 99.99% of airborne particles at 0.3 microns and above.
Ultra-Low breathing resistance
Compatible with Stealth N100 air filtration Face mask
For all US orders, we use USPS Standard Delivery is FREE for orders $50+Orders below this amount are charged $7.99for delivery Please allow up to 2-4working days for delivery Packaging: Recyclable polybag
For all International orders, we use express airmailEU = $15 per shipment (up to 10 working days)Rest of World = $30per shipment (up to 14 working days)