Check the listing for details. BiotechInnova Technoweb Surgical/Medical N95 Respirator/Mask. Condition: New. Listed at 3.00 USD. The BioTechnInnova TechnoWeb N95 Surgical Mask.Device Classification: Class 2 per 21 CFR 878.4040 Product Code: MSH510K Approval Number: K172500Filter performance (as measured by Nelson Labs) : 98%Breathability : (Delta-P) 3.6 mm H2O/cm2 (at 8 L/min)Exhalation resistance: (TEB-APR-STP-003) 7.7 (mm H2O)Skin irritation & Cytotoxicity: None observed in laboratory animals.Cytotoxicity tested with NCTC Clone 929 (L-929) mouse fibroblasts. Skin irritation tested via patch test with continuous exposure to rabbits and guinea pigs.Splash resistance: ASTM F1862Bacterial Filtration Efficiency (BFE) : 99.9%Particle size filtration : 0.1 microns minimumFiltering media (material): TechnoWeb (nanotechnology 3D fiber)Performance stability : Filtration does not decline with time. TechnoWeb does not rely on electrostatic forces.Intended use : Intended to be worn by operating room personnel to protect personnel and patient from transfer of microorganisms, body fluids, and particulates.Production facility quality certifications: ISO 9001 & ISO 14001Weight of respirator : 4.27 grams (including straps)Sizes Available in : Large, Medium, and Small.Wearing mode (3 options) Available with dual wearing mode ear loops (supplied with clip) and with traditional N95 strapsDimensions & weight of master carton : 21 W x 11 D x 17 H inches, 4.2kgExpiration : TechnoWeb material has no known expiry dateReferences : Actively supplied to Federal Government (i.e. U.S. Department of Justice)