3M EAR312-1213 Cylindrical earplugs flame retardant waterproof earplugs sleep noise reduction earplugs

3M EAR312-1213 cylindrical earplugs
Model: 312-1213
Unique size, shape and material
NRR: 29dB
SNR: 29dB
material waterproof, no irritation to the skin, easy to use, hygienic and
slow rebound PVC material, low pressure on the ear canal, more wear Comfortable.
It can be used for industrial noise prevention, and it can also be used in swimming pools with
smoldering waterproof materials. Even if it encounters a fire during the production process, it will not produce sparks.
Packing: 200 sets /box, 10 boxes/box = 2000
sets NRR: in accordance with American standard ANSI S3 .19-1974 standard test single value noise reduction value.
SNR:
The correct wearing and removal method of single value noise reduction foam earplugs tested according to the international standard ISO 4969-2
1. Wash your hands and rub the round part of the earplugs thin (only applicable to bullet and cylindrical earplugs)
2 , With the other hand around the back of the head, pull the ear up, and pull 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.