... 2) Material of plastic core: TRP White plastic with resistant to high-temperature 3) Terminal contact pin: 100% Copper and gold-plating ... TPU plastic, ROSH environmental protection, strong tenacity, wear-resisting. 3. Material of Pull shell: ABS plastic shell, ROHS standard 4 ... design, easy for tidying cord. 3.5mm Plug Fits iPod/iPhone and Most MP3 Players With microphone, convenient for charting on ...