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3M - 1110 Corded Ear Plugs

3M - 1110 Corded Ear Plugs:
3M 1110 UF foam ear plugs (corded version of the 3M 1100 ear plugs) are the stiffest of the poly- urethane foam ear plugs.For those who like the feel of UF, but want the stiffness of PVC (which makes insertion easier).