Unused, without packaging. Size: Free size (ear hole size目安: 6-9mm) Color: Green Average Noise Reduction Rating (SNR): 20dB Hearing protection to prevent damage to the eardrum and inner ear in noisy environments. You can talk while wearing them. Washable and can be kept clean. Earplugs, reduce sound pressure, attenuation, 4- Available for immediate purchase. No price reduction.