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By certification 
Feature
High filtration: BFE 99% at 0.1 micron
Breathable – Delta P<2.2
Low Particle shedding
Meets ASTM Level 2 standard, 160 mmHg
Manufactured in a controlled cleanroom environment
Advantage
Meltblown filter layer, electrostatic adsorption function, filter 90% particles
Width is 6.89inch, height can be stretched from 3.54 to 6.1inch
Invisible nose clips for shaping, soft earloop to reduce the burden on the ears
Disposable hospital mask suitable for medical staff, patients, , manicurists
Basic Information
Layer 1--- Polypropylene 25gsm, White, Green, Blue
Layer 2--- Purpose-made Melt blown 25gsm, White
Layer 3--- Soft non woven 25gsm, White
Earloop ---Urethane Elastic Fiber
Nose Bar---Polyethylene with Iron wire
http://www.xiantao-xincheng.com/
