Amazon.com: Ancable Premium 2-Pack 1/4 Inch Coupler Adapter, Heavy Duty Full Metal 6.35mm TS and TRS Female to Female Barrel, Stereo Cord Extender for Extending Guitar, Instrument, Speaker/Microphone/Patch Cables : Musical Instruments
Amazon.com : (2 Packs) 3/8" Female to 1/4" Male Thread Screw Mount Metal Adapter, 3/8 inch - 1/4 inch Tripod Plate Screw, Aluminum Alloy, Rubber Gasket : Camera And Video Accessory Bundles : Electronics