●Replacement Audio upgrade Cable Compatible with Sennheiser HD525 HD545 HD565 HD580 HD600 HD650 Headphones, extension cords ●its Cable Diameter is 4mm(After the bifurcation 3mm),its cable material is made with the OFC wire inside & made with the Braided Tangle-Free cable outside. ●length:310cm/10ft, package include:1*replacement cable(the headphone is not included) ●Its jack is 3.5mm Male & 6.35mm adapter to the jack for Sennheiser HD525 HD545 HD565 HD580 HD600 HD650 Headphones ●It is Compatible with Sennheiser HD525 HD545 HD565 HD580 HD600 HD650 Headphones