AS-1 Model Code: AE - Price is for 1 Pair (part# AS-1) This item features: -Advanced air pocket design features internal noise-blocking fins. -Four-flange profile creates better seal in the ear canal. -Less pressure in the ear canal eliminates that plugged up feeling. -Rounded flanges, tapered shape fits better in the ear canal. -Firm stem facilitates easy insertion and removal. -Noise Reduction Rate (NRR): 27 dB. Testing and approvals: -ANSI. Model Code Model Description AAMaximum Attenuation @ Frequency:38.100 dB @ 8000.000 Hz, Body Material:TPE Molded, Type:Uncorded, Packing Type:Flip-Top Box, Quantity:100 pair per box ABMaximum Attenuation @ Frequency:44.200 dB @ 8.000 kHz, Body Material:TPE Molded, Type:Red Poly Cord, Packing Type:Impact Case, Quantity:50 pair per box ACMaximum Attenuation @ Frequency:44.200 dB @ 8.000 kHz, Body Material:TPE Molded, Type:White Nylon Cord, Packing Type:Flip-Top Box, Quantity:100 pair per box ADMaximum Attenuation @ Frequency:44.200 dB @ 8.000 kHz, Body Material:TPE, Type:Red Poly Cord, Packing Type:Flip-Top Box, Quantity:100 pair per box AEMaximum Attenuation @ Frequency:44.200 dB @ 8.000 kHz, Body Material:TPE, Type:Uncorded, Packing Type:Impact Case, Quantity:50 pair per box AFMaximum Attenuation @ Frequency:44.200 dB @ 8.000 kHz, Body Material:TPE, Type:White Nylon Cord, Packing Type:Impact Case, Quantity:50 pair per box