After this period has expired, silicone products do not cover the auditory canal so tightly, which negatively affects sound amplification. This may require a bit of force. Including: 9pcs earplugs containing three different sizes for trial.
After this period has expired, silicone products do not cover the auditory canal so tightly, which negatively affects sound amplification. This may require a bit of force. Including: 9pcs earplugs containing three different sizes for trial.