6.35mm Replacement Cable Extension Cord for Sennheiser HD 518 558 569 579 599 598 CS
Amazon.com: Geekria Audio Cable Compatible with Sennheiser HD 599 SE, HD 599, HD 598, HD 598 SE, HD598 CS, HD 598 SR, HD 560 S, HD 400 PRO, HD 579, HD 559
Vakind Audio Spring HiFi Stereo Cable for SENNHEISER HD6 HD7 HD8 HD515 Replacement - Walmart.com