Amazon.com: GEEKRIA Boom Mic Headphones Cable Compatible with Sennheiser HD 599SE 598 560S, 2.5mm Jack Nylon Braided Replacement Cord with Boom Microphone and Volume/Mute Control for Gaming & Meeting (6 ft) :
Coiled Audio Cable Replacement for Sennheiser HD599 SE HD558, HD518, ATH-M50X - 2.5mm to 3.5mm Extension Cord with 6.35mm Adapter (5ft-15ft) - Walmart.com
Replacement HD598 cable Review - YouTube
Replacement Cable Sennheiser Headphones Hd | Sennheiser Hd 598 Replacement Cable - Protective Sleeve - Aliexpress
OFC USB Type C 2.5mm Nylon Braided Cable Replacement Extension Cord for Sennheiser HD 598 CS SE 558 518 599 569 579 Headphones - AliExpress