InterMask(TM) Sterile Surgical Face MasK, Disposable Protective Mask.12891-001. Having high level static filtration non-woven, effectively preventing micro dust and bacteria with Bacteria Filtration Efficiency (BFE) at 98.4%, Particle Filtration Efficiency (PFE)>94.72% , pH Value is 6.4. Length : 175 mm (+/- 1cm), Width : 90,5 mm (+/- 1cm). CE Certification and ISO9001 Qualified System. Packaging information: 2000 pcs / case; 50 pcs/ box/polybag..Case size: 52x38x25cm.With CE/FDA Certification