CESS 3.5mm Stereo Female to 3.5mm Stereo Female Coupler Connector - 3.5mm Stereo Female to Female (4 Pack) 3.5mm Female to 3.5mm Female 3.5mm Stereo to 3.5mm Stereo 3.5mm stereo AUX cable extension extender Gold plated for maximum signal transfer & durability Material :Copper