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3.5mm 1/8" Female Stereo to 2 x 6.35mm 1/4" Mono Male Adapter Y Splitter Cable | eBay
BesYee 4330230285 Poyiccot 1/4 to 3.5mm Headphone Adapter, 3.5mm to 1/4 Cable, 3.5mm Mini 1/8" TRS Stereo Male to 2 Dual 1/4 Inch 6.35mm Mono TS F
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Amazon.com: 3.5mm Stereo to Mono Adapter, 2 Pack 3.5mm 1/8" TRS Stereo Male Plug to 3.5mm 1/8" Mono Female Jack : Electronics
Amazon.com: Disino 1/4 Mono to 3.5mm Stereo Adapter, Gold Plated 6.35mm TS Male Plug to 1/8 inch TRS Female Audio Connector - 2 Pack : Electronics