3m 1100 ear plugs snr 37 db 3m 1100ds the 3m 1100 ear plugs snr 37db 2 pairs are supplied in pairs of two orange ear plugs including an aluminium storage boxmaximum wearing comfort plus reliable protection are just two of the features of these specifically designed plugs that have been conically shaped for a perfect fit 3m 1100ds 1100 ear plugs snr 37 db 2 pairs