Sennheiser Adapter 6,3S - 3,5S - - Adapter jack 6.3S - jack socket 3.5S
Amazon.com: LOL PARTY HD598 Cable Coiled Aux Cord Replacement for Sennheiser HD598 Cs HD599 HD569 HD579 HD558 HD518 Headphone Audio Cable with 6.35mm Adapter 4 to 12ft Long : Electronics
Sennheiser 6.3mm Female to 3.5mm Male Adapter Cable
Amazon.com: Headphone Jack Adapter Compatible with Audio-Technica ATH-M40X ATH-M50X ATH-M60X ATH-M70X, Sennheiser HD518 HD558 HD595 HD595 HD598se HD569 HD579 HD599-2.5mm to 3.5mm Plug : Electronics