Applicable to Laotie ATH-M50X M40X m70x headphone audio cable aux 2.5mm head

Core material: Bare copper wireWire material: oxygen free copper1/8" (3.5mm) and 1/4" (6.35mm) to 2.5mm male stretch AUX extension cordsGold-plated connector ensure you get reliable and crisp soundSpring audio cable...