... stem comforms to ear shape and ear piece retention.Attenuation filter in 23db for music events, disco, concerts, clubbing, etc ... , filter in 27dB for shooting and other high noisy condition;Low- ... 2.4cm MaterialFoam Colouryellow, pink, green, red, etcRebound time5-25 secondsCertificateCE EN352-2CordNylon, PVC Red, yellow, blue PU or Silicon Bullet Low ...