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Sterviral Compatible Medical ASTM LEVEL 3 Filters 10-pack
- Average BFE & PFE Efficiency lab report are 99.8%, BFE & PFE Meets ASTM L3 requirements. Fluid Resistance Level 3 approved 160mm Hg.
- Doctor Procedure Medical Level Mask
- Contain high-quality Melt-blown Fabric on the middle layer which Max Block High BFE & PFE
- Full-Width Anti-Fog Foam Strip. Total 4 Layers of Medical level protection.
- Insert inside the face Mask for additional protection
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