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Open Box Heil Pro Micro PMD-6 "Dual Side" - Heil Traveler Dual Side with HC 6 Dynamic Element SN112791 GigaParts.com
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Amazon.com : Heil Pro-Micro Dualheadset W/hc-6.-3db Points are Fixed at 100hz and 12 Khz with Sensitivity Of-57db at 600ohms Output Impedance (Centered at 1 Khz) : Sports & Outdoors
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