Peltor - 3M Optime III Ear Muffs 33DB - H540A Iosso Optical sensor size: 34 x

Optical sensor size: 34 x 35 x 60 mm

1 x Lenzi replacement 3" top ONLY

Sierra's famous MatchKing design assures superb accuracy

Provides a more reliable alignment with no canting

・34mm diameter body

Peltor - 3M Optime III Ear Muffs 33DB - H540A Iosso Optical sensor size: 34 xThe 3M PELTOR Optime III, H540A earmuff is a high performance hearing protector and has been developed for use in high noise environments like airports, marine engine rooms, power stations, and print works. The double casing technology minimises resonance in the holder casing resulting in maximum high frequency attenuation. The large space inside the cups helps reduce heat and moisture build up, and the soft, wide foam cushions offer low contact