Insten 1 / 4 Audio to 1 / 8 Audio M / F Adapter (1/4" M to 1/8" 3.5mm F) - Walmart.com
3 Piece Socket Adapter Set Increasing 3/8" 1/2" 3/4" Female 1/4" 3/8" 1/2" Male - Walmart.com
LTWFITTING 1/4 in. FIP x 1/8 in. MIP Brass Pipe Adapter Fitting (5-Pack) HF1024205 - The Home Depot
1/4" NPT Male to 1/8" NPT Male Brass Pipe Hex Reducer/Reducing Nipple Fitting/Adapter: Air Tool Fittings: Amazon.com: Industrial & Scientific
Amazon.com: Cable Matters 5-Pack 1/4 to 1/8 Headphone Adapter (3.5mm to 1/4 Adapter, 6.35mm to 3.5mm Adapter) : Everything Else
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
Amazon.com: tisino 1/8 to 1/4 Stereo Cable, 3.5mm to 1/4 Adapter Aux Cord Stereo Audio Cable for Guitar, Keyboard Piano, Laptop, Home Theater Devices, Speaker and Amplifiers -Nylon Braid 3ft : Electronics
Amazon.com: VCE 1/4" to 1/8" Adapter, 3.5mm 1/8 inch Male to 6.35mm 1/4 inch Female Audio Jack Gold Plated Adapter for Amplifiers, Guitar, Home Theater Devices, Laptop, Headphones - 8 inch : Electronics
1/4" Male to 1/8" Female Adapter
1/4" Adaptor – 64 Audio
Brass, 3/8 in x 1/8 in Fitting Pipe Size, Reducing Adapter - 1DFY6|6-2 RA-B - Grainger
Comprehensive Stereo 1/4" Male to Stereo 1/8" (3.5mm) SPP-MJS