Shure HPAQA1 1/4 inch TRS Male to Threaded 3.5mm TRS Female Stereo Headphone Adapter | Sweetwater
2-Pack 6.35mm (1/4 inch) Male to 3.5mm (1/8 inch) Female Stereo Jack Adapter for 3.5mm Aux Cable,Guitar Amplifier,Headphone - Newegg.com
1/4 Inch Stereo Jack To 3.5mm Stereo Adapter - Walmart.com
Amazon.com: JOMLEY 1/4 to 3.5mm Adapter, 1/8"(3.5mm) Female to 1/4"(6.35mm) Male Adapter, Quarter inch to 1/8 inch Stereo Headphone Adapter, Amp Adapter - 2 Pack : Electronics
Livewire Essential Headphone Adapter 1/4" Trs Male To 3.5 Mm Trs Female : Target
OmniSwivel Adapter: 1/4-Inch NPT Male = 7/16-Inch F | Dive Gear Express®