China Leak-proof Masks manufacturers Disposable medical mask Specification: FFP2 NR mask,10.5x15.5cm Feature: particle filtering half mask Standard:EN 149:2001+A1:2009 FFP2 NR Material: 58% non-woven fabrics,40% melt blown,20% hot air filter cloth Certificates Testing report EN149-1 Quality control system 1. Filter material comprehensive performance tester. 2. Ultraviolet spectrophotometer....