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BINYOU 3.5mm Headphone Adapter Jack Plug Converter For Audio-Technica ATH-M70X M40X M50X M60X For Sennheiser HD518 HD598 HD599 - Walmart.com
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Cable for HD 800 Series, 6,35 mm headphone jack, 3m – Sennheiser
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Genuine SENNHEISER Cable Adapter Female 1/4" to Male 1/8" 3.5mm Plug Headphones 4109987378983 | eBay