Matrix Single-use Earplugs Matrix Single Use Earplug Blue 23 Nrr Low Attenu, Uniform attenuation profile blocks out noise while voice frequencies can be heard more naturall, Delivers instant protection upon proper insertion no need to wait for foam to expand, Smooth outer skin and reduced diameter provide long-term comfort, Patented no-roll design makes insertion fast and easy, Attenuation: Low, Body Material: TPE Foam, Color: Blue, Maximum Attenuation Frequency: 43, 500 dB - 8, 000 kHz, Noise Reduction Rate (NRR) 23 dB, Quantity: 200 pair per box, Type: Uncorded, SKU: ORSNO62045