3M EAR311-1101 cylindrical earplugs with wire anti-noise earplugs

NRR: 29 dB SNR: 29dB
material is waterproof, non-irritating to the skin, easy to use, hygienic and
slow rebound PVC material, low pressure on the ear canal, more comfortable to wear
Packaging: 200 pairs /box, 10 boxes/box=2000 pairs of
foam How to put on and take off the earplugs correctly
1. Wash your hands and rub the round part of the earplugs thinly (only applicable to bullet and cylindrical earplugs)
2. Go around the back of the head with the other hand, and pull the ear upwards and outwards Put the round part of the earplug into the ear. This step is suitable for all earplugs.
3.
Hold the earplugs gently until the earplugs are fully inflated and shaped. 4. Remove the earplugs for comfort and safety. Please gently pull out the earplugs while rotating.