1, Silicon earplug with CE certification 2, NRR(NOISE REDACTION RATIO): 30db 3, Anti-bacterial protection Eco-friendly silicone ear earplugs1, Matiral: silicone2 ... cord choose5, Daily output: 100,000 pairs per day6, Certification: CE Certification7, Operating environment: all kinds of noisy environment8, Package: opp ... be printed on the surface of package eco-friendly silicone ear earplugs