... to 34dB, providing a comfortable all-day fitEarplugs with retention device, ergonomic design and multi-flanged stem ... and small bell shape;Adjust the color according to pantone number;Soft PU material, rebound slowly and low pressure to ... .4cm MaterialFoam Colouryellow, pink, green, red, etcRebound time5-25 secondsCertificateCE EN352-2CordNylon, PVC Red, yellow, blue PU or Silicon Bullet Low profile ...