3M 1427 earmuffs

3M 1427 Earmuff
Model: 1427
NRR: 27dB
Multi-point wearing
headband with comfortable padding,
adjustable headband to ensure comfortable wearing in three positions (top of head, back of head and chin) of the headband.
Packing: 20 pay/ Box
NRR: Single value noise reduction value tested according to the American standard ANSI S3.19-1974 standard.
SNR: Single value noise reduction value tested in accordance with the international standard ISO 4969-2